{"product_id":"ngk-91874-laser-iridium-spark-plug-bmw-550i-650i-750i-760li-x5m-x6m-rolls-royce-ghost","title":"NGK 91874 Laser Iridium Spark Plug BMW 550i 650i 750i 760Li X5M X6M Rolls-Royce Ghost","description":"\u003c!-- ============================================================ --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- SECTION 1: OPENING PARAGRAPH                                 --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- ============================================================ --\u003e\n\u003cp\u003eThe \u003cstrong\u003eNGK 91874\u003c\/strong\u003e (SIZKBR8B8HG) is an NGK Laser Iridium High Ignitability Spark Plug engineered as a factory-spec replacement for \u003cstrong\u003eBMW N63B44 V8\u003c\/strong\u003e and \u003cstrong\u003eN74B66 V12\u003c\/strong\u003e engines, plus the Rolls-Royce Ghost 6.6L V12. These are direct OEM-grade plugs manufactured in Japan to BMW's tight tolerances, offering 100,000-mile service life with a laser-welded iridium center electrode and platinum ground electrode. Sold individually. NGK 91874 is the correct plug for BMW 550i, 650i, 750i, 750Li, 760Li, X5 M, X6 M, M5, M6, and Rolls-Royce Ghost applications listed below.\u003c\/p\u003e\n\u003c!-- ============================================================ --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- SECTION 2: LASER IRIDIUM TECHNOLOGY                          --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- ============================================================ --\u003e\n\u003ch4\u003eNGK Laser Iridium: OEM-Grade Performance, 100,000-Mile Life\u003c\/h4\u003e\n\u003cp\u003eNGK's Laser Iridium series is not a performance upgrade; it is a premium OEM-replacement plug that matches or exceeds factory specifications. The iridium center electrode is laser-welded to a 0.6mm fine-wire tip, reducing the voltage required to fire the plug and producing a more consistent, complete combustion event on every stroke. The platinum ground electrode resists erosion across the full service interval.\u003c\/p\u003e\n\u003cp\u003eBMW specifies Laser Iridium plugs for the twin-turbocharged N63B44 and N74B66 engines for a reason: these high-output, direct-injected V8 and V12 applications demand a plug that fires reliably under boost, resists fouling during the N63's warm-up enrichment cycle, and lasts through extended service intervals. SIZKBR8B8HG delivers exactly that.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLaser-welded 0.6mm iridium center electrode for consistent, high-energy spark\u003c\/li\u003e\n\u003cli\u003ePlatinum ground electrode for extended service life\u003c\/li\u003e\n\u003cli\u003eExtended (projected) tip design improves ignitability and self-cleaning\u003c\/li\u003e\n\u003cli\u003e5k Ohm resistor suppresses EMI interference with BMW electronics\u003c\/li\u003e\n\u003cli\u003ePreset 0.8mm (0.031 in.) gap, factory-calibrated; do not adjust\u003c\/li\u003e\n\u003cli\u003e100,000-mile OEM-grade service life\u003c\/li\u003e\n\u003cli\u003eManufactured in Japan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- ============================================================ --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- SECTION 3: LASER IRIDIUM vs. IRIDIUM IX                      --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- ============================================================ --\u003e\n\u003ch4\u003eLaser Iridium vs. Iridium IX: Know the Difference\u003c\/h4\u003e\n\u003cp\u003eNGK produces two iridium spark plug lines, and they are \u003cstrong\u003enot interchangeable\u003c\/strong\u003e for this application. The \u003cstrong\u003eLaser Iridium\u003c\/strong\u003e series (SIZKBR8B8HG) is the OEM-spec plug designed for BMW and Rolls-Royce factory service. It uses a laser-welded iridium center electrode with a platinum-tipped ground electrode, is preset at the factory gap, and is not to be adjusted. The \u003cstrong\u003eIridium IX\u003c\/strong\u003e is an aftermarket performance plug with a different electrode geometry and gap spec; it is not BMW-specified for the N63B44 or N74B66 engines. For correct OEM replacement, use Laser Iridium.\u003c\/p\u003e\n\u003c!-- ============================================================ --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- SECTION 4: HOW MANY PLUGS - SET GUIDANCE                     --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- ============================================================ --\u003e\n\u003ch4\u003eHow Many Plugs Do You Need?\u003c\/h4\u003e\n\u003cp\u003eThis listing is for \u003cstrong\u003eone (1) spark plug\u003c\/strong\u003e. The number of plugs per vehicle depends on engine configuration:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBMW N63B44 V8\u003c\/strong\u003e (550i, 650i, 750i, 750Li, X5, X6, M5, M6): \u003cstrong\u003e8 plugs\u003c\/strong\u003e per complete set\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBMW S63B44 V8\u003c\/strong\u003e (X5 M, X6 M, M5, M6): \u003cstrong\u003e8 plugs\u003c\/strong\u003e per complete set\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBMW N74B66 V12\u003c\/strong\u003e (760Li): \u003cstrong\u003e12 plugs\u003c\/strong\u003e per complete set\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRolls-Royce Ghost 6.6L V12\u003c\/strong\u003e: \u003cstrong\u003e12 plugs\u003c\/strong\u003e per complete set\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAdjust quantity at checkout. BMW N63 owners: replace all 8 plugs as a set at the same service interval to maintain even ignition timing across all cylinders.\u003c\/p\u003e\n\u003c!-- ============================================================ --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- SECTION 5: FITMENT INTRO + TABLE                             --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- ============================================================ --\u003e\n\u003ch4\u003eFitment BMW N63B44 \/ N74B66 and Rolls-Royce Ghost\u003c\/h4\u003e\n\u003cp\u003eSIZKBR8B8HG fits BMW 5 Series, 6 Series, 7 Series, X5, X6, M5, and M6 models equipped with the \u003cstrong\u003eN63B44 4.4L Twin-Turbo V8\u003c\/strong\u003e or \u003cstrong\u003eS63B44 4.4L Twin-Turbo V8\u003c\/strong\u003e, plus the \u003cstrong\u003eBMW 760Li with N74B66 6.0L V12\u003c\/strong\u003e and the \u003cstrong\u003eRolls-Royce Ghost with N74B66 6.6L V12\u003c\/strong\u003e. Verify your engine code on the underhood sticker or via VIN decoder before ordering. The N63B44A (early build) variant may use sibling part SIZKBR8A8HS -- see FAQ below.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eYear\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eTrim \/ Variant\u003c\/th\u003e\n\u003cth\u003eEngine\u003c\/th\u003e\n\u003cth\u003ePlugs Needed\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2009\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e550i\u003c\/td\u003e\n\u003ctd\u003eF10\/F11 Sedan\/Wagon\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2010\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e550i\u003c\/td\u003e\n\u003ctd\u003eF10\/F11 Sedan\/Wagon\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2011\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e550i\u003c\/td\u003e\n\u003ctd\u003eF10\/F11 Sedan\/Wagon\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2012\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e550i\u003c\/td\u003e\n\u003ctd\u003eF10\/F11 Sedan\/Wagon\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2013\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e550i\u003c\/td\u003e\n\u003ctd\u003eF10\/F11 Sedan\/Wagon\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2014\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e550i\u003c\/td\u003e\n\u003ctd\u003eF10\/F11 Sedan\/Wagon\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2015\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e550i\u003c\/td\u003e\n\u003ctd\u003eF10\/F11 Sedan\/Wagon\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2012\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e550i xDrive\u003c\/td\u003e\n\u003ctd\u003eF10 Sedan\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2013\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e550i xDrive\u003c\/td\u003e\n\u003ctd\u003eF10 Sedan\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2014\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e550i xDrive\u003c\/td\u003e\n\u003ctd\u003eF10 Sedan\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2015\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e550i xDrive\u003c\/td\u003e\n\u003ctd\u003eF10 Sedan\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2010\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e650i\u003c\/td\u003e\n\u003ctd\u003eF12\/F13 Coupe\/Convertible\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2011\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e650i\u003c\/td\u003e\n\u003ctd\u003eF12\/F13 Coupe\/Convertible\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2012\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e650i\u003c\/td\u003e\n\u003ctd\u003eF12\/F13 Coupe\/Convertible\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2013\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e650i\u003c\/td\u003e\n\u003ctd\u003eF12\/F13 Coupe\/Convertible\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2014\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e650i\u003c\/td\u003e\n\u003ctd\u003eF12\/F13 Coupe\/Convertible\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2015\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e650i\u003c\/td\u003e\n\u003ctd\u003eF12\/F13 Coupe\/Convertible\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2012\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e650i xDrive\u003c\/td\u003e\n\u003ctd\u003eF12\/F13 Coupe\/Convertible\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2013\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e650i xDrive\u003c\/td\u003e\n\u003ctd\u003eF12\/F13 Coupe\/Convertible\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2014\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e650i xDrive\u003c\/td\u003e\n\u003ctd\u003eF12\/F13 Coupe\/Convertible\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2015\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e650i xDrive\u003c\/td\u003e\n\u003ctd\u003eF12\/F13 Coupe\/Convertible\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2009\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e750i\u003c\/td\u003e\n\u003ctd\u003eF01\/F02 Sedan\/LWB\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2010\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e750i\u003c\/td\u003e\n\u003ctd\u003eF01\/F02 Sedan\/LWB\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2011\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e750i\u003c\/td\u003e\n\u003ctd\u003eF01\/F02 Sedan\/LWB\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2012\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e750i\u003c\/td\u003e\n\u003ctd\u003eF01\/F02 Sedan\/LWB\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2013\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e750i\u003c\/td\u003e\n\u003ctd\u003eF01\/F02 Sedan\/LWB\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2014\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e750i\u003c\/td\u003e\n\u003ctd\u003eF01\/F02 Sedan\/LWB\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2015\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e750i\u003c\/td\u003e\n\u003ctd\u003eF01\/F02 Sedan\/LWB\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2009\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e750Li\u003c\/td\u003e\n\u003ctd\u003eF01\/F02 LWB\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2010\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e750Li\u003c\/td\u003e\n\u003ctd\u003eF01\/F02 LWB\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2011\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e750Li\u003c\/td\u003e\n\u003ctd\u003eF01\/F02 LWB\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2012\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e750Li\u003c\/td\u003e\n\u003ctd\u003eF01\/F02 LWB\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2013\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e750Li\u003c\/td\u003e\n\u003ctd\u003eF01\/F02 LWB\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2014\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e750Li\u003c\/td\u003e\n\u003ctd\u003eF01\/F02 LWB\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2015\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e750Li\u003c\/td\u003e\n\u003ctd\u003eF01\/F02 LWB\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2012\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e750i xDrive\u003c\/td\u003e\n\u003ctd\u003eF01\/F02\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2013\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e750i xDrive\u003c\/td\u003e\n\u003ctd\u003eF01\/F02\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2014\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e750i xDrive\u003c\/td\u003e\n\u003ctd\u003eF01\/F02\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2015\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e750i xDrive\u003c\/td\u003e\n\u003ctd\u003eF01\/F02\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2012\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e750Li xDrive\u003c\/td\u003e\n\u003ctd\u003eF01\/F02 LWB\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2013\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e750Li xDrive\u003c\/td\u003e\n\u003ctd\u003eF01\/F02 LWB\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2014\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e750Li xDrive\u003c\/td\u003e\n\u003ctd\u003eF01\/F02 LWB\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2015\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e750Li xDrive\u003c\/td\u003e\n\u003ctd\u003eF01\/F02 LWB\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2009\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e760Li\u003c\/td\u003e\n\u003ctd\u003eF01\/F02 V12\u003c\/td\u003e\n\u003ctd\u003e6.0L V12 N74B66\u003c\/td\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2010\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e760Li\u003c\/td\u003e\n\u003ctd\u003eF01\/F02 V12\u003c\/td\u003e\n\u003ctd\u003e6.0L V12 N74B66\u003c\/td\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2011\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e760Li\u003c\/td\u003e\n\u003ctd\u003eF01\/F02 V12\u003c\/td\u003e\n\u003ctd\u003e6.0L V12 N74B66\u003c\/td\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2012\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e760Li\u003c\/td\u003e\n\u003ctd\u003eF01\/F02 V12\u003c\/td\u003e\n\u003ctd\u003e6.0L V12 N74B66\u003c\/td\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2013\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e760Li\u003c\/td\u003e\n\u003ctd\u003eF01\/F02 V12\u003c\/td\u003e\n\u003ctd\u003e6.0L V12 N74B66\u003c\/td\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2014\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e760Li\u003c\/td\u003e\n\u003ctd\u003eF01\/F02 V12\u003c\/td\u003e\n\u003ctd\u003e6.0L V12 N74B66\u003c\/td\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2010\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eX5 M\u003c\/td\u003e\n\u003ctd\u003eE70 SAV\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 S63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2011\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eX5 M\u003c\/td\u003e\n\u003ctd\u003eE70 SAV\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 S63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2012\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eX5 M\u003c\/td\u003e\n\u003ctd\u003eE70 SAV\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 S63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2013\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eX5 M\u003c\/td\u003e\n\u003ctd\u003eE70 SAV\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 S63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2010\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eX6 M\u003c\/td\u003e\n\u003ctd\u003eE71 SAC\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 S63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2011\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eX6 M\u003c\/td\u003e\n\u003ctd\u003eE71 SAC\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 S63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2012\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eX6 M\u003c\/td\u003e\n\u003ctd\u003eE71 SAC\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 S63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2013\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eX6 M\u003c\/td\u003e\n\u003ctd\u003eE71 SAC\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 S63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2010\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eX5 xDrive50i\u003c\/td\u003e\n\u003ctd\u003eE70 SAV\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2011\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eX5 xDrive50i\u003c\/td\u003e\n\u003ctd\u003eE70 SAV\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2012\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eX5 xDrive50i\u003c\/td\u003e\n\u003ctd\u003eE70 SAV\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2013\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eX5 xDrive50i\u003c\/td\u003e\n\u003ctd\u003eE70 SAV\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2010\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eX6 xDrive50i\u003c\/td\u003e\n\u003ctd\u003eE71 SAC\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2011\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eX6 xDrive50i\u003c\/td\u003e\n\u003ctd\u003eE71 SAC\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2012\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eX6 xDrive50i\u003c\/td\u003e\n\u003ctd\u003eE71 SAC\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2013\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eX6 xDrive50i\u003c\/td\u003e\n\u003ctd\u003eE71 SAC\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2014\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eX6 xDrive50i\u003c\/td\u003e\n\u003ctd\u003eE71 SAC\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 N63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2011\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM5\u003c\/td\u003e\n\u003ctd\u003eF10 Sedan\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 S63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2012\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM5\u003c\/td\u003e\n\u003ctd\u003eF10 Sedan\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 S63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2013\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM5\u003c\/td\u003e\n\u003ctd\u003eF10 Sedan\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 S63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2012\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM6\u003c\/td\u003e\n\u003ctd\u003eF12\/F13 Coupe\/Convertible\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 S63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2013\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM6\u003c\/td\u003e\n\u003ctd\u003eF12\/F13 Coupe\/Convertible\u003c\/td\u003e\n\u003ctd\u003e4.4L V8 S63B44\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2011\u003c\/td\u003e\n\u003ctd\u003eRolls-Royce\u003c\/td\u003e\n\u003ctd\u003eGhost\u003c\/td\u003e\n\u003ctd\u003eSedan\u003c\/td\u003e\n\u003ctd\u003e6.6L V12 N74B66\u003c\/td\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2012\u003c\/td\u003e\n\u003ctd\u003eRolls-Royce\u003c\/td\u003e\n\u003ctd\u003eGhost\u003c\/td\u003e\n\u003ctd\u003eSedan\u003c\/td\u003e\n\u003ctd\u003e6.6L V12 N74B66\u003c\/td\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2013\u003c\/td\u003e\n\u003ctd\u003eRolls-Royce\u003c\/td\u003e\n\u003ctd\u003eGhost\u003c\/td\u003e\n\u003ctd\u003eSedan\u003c\/td\u003e\n\u003ctd\u003e6.6L V12 N74B66\u003c\/td\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c!-- ============================================================ --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- SECTION 6: SPECS TABLE                                       --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- ============================================================ --\u003e\n\u003ch4\u003eFull Specifications NGK 91874 SIZKBR8B8HG\u003c\/h4\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number (Alphanumeric)\u003c\/td\u003e\n\u003ctd\u003eSIZKBR8B8HG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNGK Stock Number\u003c\/td\u003e\n\u003ctd\u003e91874\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003e00087295918746\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eLaser Iridium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat Range\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread Size\u003c\/td\u003e\n\u003ctd\u003e12mm x 1.25mm pitch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread Reach\u003c\/td\u003e\n\u003ctd\u003e25.2mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpark Plug Gap\u003c\/td\u003e\n\u003ctd\u003e0.8mm (0.031 in.) -- PRESET, DO NOT ADJUST\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResistor\u003c\/td\u003e\n\u003ctd\u003eYes, 5k Ohm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTip Projection\u003c\/td\u003e\n\u003ctd\u003eExtended (Projected Tip)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCenter Electrode\u003c\/td\u003e\n\u003ctd\u003eIridium (Laser-Welded Fine Wire)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGround Electrode\u003c\/td\u003e\n\u003ctd\u003ePlatinum-Tipped\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eService Life\u003c\/td\u003e\n\u003ctd\u003e100,000 miles (OEM-grade)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003e1 plug per order (sold individually)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003eJapan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e60-Day Limited\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c!-- ============================================================ --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- SECTION 7: WHAT'S INCLUDED                                   --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- ============================================================ --\u003e\n\u003ch4\u003eWhat's Included\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e1x NGK Laser Iridium Spark Plug SIZKBR8B8HG (91874)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eOne plug per order. Order 8 for a complete set on all N63B44 or S63B44 V8 applications. Order 12 for a complete set on all N74B66 V12 applications (BMW 760Li, Rolls-Royce Ghost).\u003c\/p\u003e\n\u003c!-- ============================================================ --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- SECTION 8: SIBLING PART COMPARISON                           --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- ============================================================ --\u003e\n\u003ch4\u003eSIZKBR8B8HG vs. SIZKBR8A8HS (NGK 1555): Which One Do You Need?\u003c\/h4\u003e\n\u003cp\u003eNGK produces two closely related Laser Iridium plugs for the N63 engine family. The \u003cstrong\u003eSIZKBR8B8HG (91874)\u003c\/strong\u003e is the current production plug for the N63B44 engine in its updated form, covering 2009-2015 applications as listed in the fitment table above. The \u003cstrong\u003eSIZKBR8A8HS (NGK 1555)\u003c\/strong\u003e is the predecessor plug designed for early N63B44A applications. The two plugs share the same heat range, thread size, and reach, but differ in electrode design and are not interchangeable. Always verify your engine build date and engine code variant before ordering. If your BMW dealer or independent BMW specialist has previously used SIZKBR8A8HS, check your engine code variant to confirm the correct current-spec plug before switching.\u003c\/p\u003e\n\u003c!-- ============================================================ --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- SECTION 9: INSTALLATION OVERVIEW                             --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- ============================================================ --\u003e\n\u003ch4\u003eInstallation Overview BMW N63 and N74 Spark Plug Replacement\u003c\/h4\u003e\n\u003cp\u003eReplacing spark plugs on the BMW N63B44 is more involved than a typical plug swap. The N63 is a \"hot vee\" twin-turbo V8, meaning the turbos sit in the valley between the cylinder banks and the intake manifold must be partially or fully removed to access the rear bank plugs. Allow 3-5 hours for a complete set replacement if you have BMW-specific experience. The N74B66 V12 in the 760Li and Ghost is a similarly complex procedure and is typically best left to a BMW or Rolls-Royce specialist.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTorque spec: 25 Nm (18 lb-ft) do not overtighten the 12mm thread\u003c\/li\u003e\n\u003cli\u003eGap is preset at 0.8mm from the factory -- do not attempt to adjust\u003c\/li\u003e\n\u003cli\u003eUse a small amount of anti-seize on threads only if your torque wrench cannot confirm a dry torque spec; NGK generally recommends dry installation per spec\u003c\/li\u003e\n\u003cli\u003eN63 rear bank requires intake manifold removal for full plug access on most build dates\u003c\/li\u003e\n\u003cli\u003eReplace all plugs in the bank or full set at the same service interval\u003c\/li\u003e\n\u003cli\u003eRecommended service interval: BMW specifies 60,000 miles for the N63 engine; many enthusiasts replace at 30,000-45,000 miles given the N63's thermal demands\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- ============================================================ --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- SECTION 10: PROP 65 \/ WARRANTY                               --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- ============================================================ --\u003e\n\u003ch4\u003eWarranty and Regulatory Information\u003c\/h4\u003e\n\u003cp\u003eThis plug carries a \u003cstrong\u003e60-day limited warranty\u003c\/strong\u003e against manufacturing defects. As an OEM-grade plug with a 100,000-mile rated service life, premature failure under normal operating conditions within that interval is covered. Retain your purchase receipt.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCalifornia residents:\u003c\/strong\u003e This product contains chemicals known to the State of California to cause cancer and reproductive harm. See \u003ca href=\"http:\/\/www.p65warnings.ca.gov\"\u003ewww.p65warnings.ca.gov\u003c\/a\u003e.\u003c\/p\u003e\n\u003c!-- ============================================================ --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- SECTION 11: ABOUT NGK                                        --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- ============================================================ --\u003e\n\u003ch4\u003eAbout NGK Spark Plugs\u003c\/h4\u003e\n\u003cp\u003eNGK is the world's largest manufacturer of spark plugs and is the OEM supplier to BMW, Toyota, Honda, Nissan, and dozens of other manufacturers. The Laser Iridium series represents NGK's highest-grade replacement plug line, built to exacting tolerances using materials and processes developed for factory fitment. Every SIZKBR8B8HG plug is manufactured in Japan and meets or exceeds the original factory specification for N63B44 and N74B66 applications.\u003c\/p\u003e\n\u003c!-- ============================================================ --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- SECTION 12: FAQ                                              --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- ============================================================ --\u003e\n\u003ch4\u003eFrequently Asked Questions\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eWhat spark plug gap does NGK 91874 come set to, and can I adjust it?\u003c\/strong\u003e\u003cbr\u003eThe gap for SIZKBR8B8HG is 0.8mm (0.031 in.), set at the factory during manufacturing. Do not attempt to adjust the gap on any NGK Laser Iridium plug. The laser-welded iridium electrode is extremely fragile and will be damaged by any gap tool contact. Install the plug at the factory-set gap exactly as received.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow often should I replace spark plugs on a BMW 550i, 750i, or X5 with the N63B44 engine?\u003c\/strong\u003e\u003cbr\u003eBMW's official service interval for the N63B44 is 60,000 miles. Many experienced N63 owners and independent BMW specialists recommend shortening this to 30,000-45,000 miles given the N63's elevated operating temperatures, oil consumption characteristics, and the labor cost of a late replacement. Plugs left in too long on turbocharged direct-injection engines can seize in the head and cause significant damage on removal.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow many spark plugs do I need for my BMW N63B44 V8?\u003c\/strong\u003e\u003cbr\u003eThe N63B44 is an 8-cylinder engine and requires 8 spark plugs for a full set. This listing sells one plug at a time. Set your quantity to 8 at checkout for a complete engine service. The BMW 760Li and Rolls-Royce Ghost V12 require 12 plugs per full set.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between the N63B44 and S63B44 engines? Do they use the same plug? \u003c\/strong\u003e\u003cbr\u003eThe 91874 is the standard twin-turbo 4.4L V8 found in the 550i, 650i, 750i, 750Li, X5 xDrive50i, and X6 xDrive50i. The S63B44 is the high-output M-tuned version of the same architecture used in the X5 M, X6 M, M5, and M6. Both engines are listed in the fitment table above and use SIZKBR8B8HG (91874). Confirm fitment by engine code before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between NGK Laser Iridium and NGK Iridium IX?\u003c\/strong\u003e\u003cbr\u003eLaser Iridium plugs are OEM-spec replacement plugs with a laser-welded fine-wire iridium center electrode and a factory-preset gap. Iridium IX is a separate NGK aftermarket performance line with a different electrode geometry and a gap spec intended for adjustment. BMW specifies Laser Iridium for the N63B44 and N74B66 engines. Using Iridium IX in place of Laser Iridium is not a BMW-approved substitution and may affect ignition timing, emissions, and long-term reliability on these engines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill aftermarket spark plugs void my BMW warranty?\u003c\/strong\u003e\u003cbr\u003eUnder the federal Magnuson-Moss Warranty Act, an aftermarket part cannot void your factory warranty unless the manufacturer can demonstrate that the specific aftermarket part caused the specific failure being claimed. Replacing worn plugs with OEM-equivalent NGK Laser Iridium plugs at the correct service interval is unlikely to affect any BMW warranty claim. For vehicles still under factory warranty, consult your dealer if you have concerns about documentation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need to replace spark plugs on both banks at the same time on the N63?\u003c\/strong\u003e\u003cbr\u003eYes. On any multi-cylinder engine, replacing plugs as a complete set ensures consistent ignition timing across all cylinders. On the N63B44 in particular, where rear-bank access requires intake manifold removal, replacing all 8 plugs in one service saves significant labor cost compared to returning to finish the other bank later.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the SIZKBR8A8HS, and is it the same as SIZKBR8B8HG?\u003c\/strong\u003e\u003cbr\u003eSIZKBR8A8HS (NGK stock number 1555) is the predecessor Laser Iridium plug for early N63B44A engine variants. While both plugs share the same heat range, thread dimensions, and reach, they are distinct part numbers with different electrode specifications and are not interchangeable. Check your engine's build date and exact N63 variant designation before choosing between the two. When in doubt, consult an independent BMW specialist or the NGK application guide using your VIN.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this plug compatible with the Rolls-Royce Ghost?\u003c\/strong\u003e\u003cbr\u003eYes. The 2011-2013 Rolls-Royce Ghost uses a BMW-derived N74B66 6.6L twin-turbo V12 engine. SIZKBR8B8HG is the correct Laser Iridium replacement plug for this application. A complete set requires 12 plugs. Rolls-Royce specialist service is recommended for plug replacement on the Ghost given engine access complexity.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the thread size and reach for NGK91874?\u003c\/strong\u003e\u003cbr\u003eSIZKBR8B8HG uses a 12mm x 1.25mm thread pitch with a 25.2mm reach. These dimensions match the N63B44 and N74B66 cylinder head specifications exactly. Do not substitute a plug with a different reach -- an incorrect reach can cause the electrode to protrude into the combustion chamber or sit recessed, both of which damage the engine.\u003c\/p\u003e","brand":"NGK","offers":[{"title":"Default Title","offer_id":45944312463439,"sku":"NGK91874","price":83.32,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/ngk-91874-sizkbr8b8hg-laser-iridium-spark-plug.png?v=1782166494","url":"https:\/\/www.blackopsautoworks.com\/products\/ngk-91874-laser-iridium-spark-plug-bmw-550i-650i-750i-760li-x5m-x6m-rolls-royce-ghost","provider":"Black Ops Auto Works","version":"1.0","type":"link"}