{"product_id":"ngk-iridium-ix-spark-plug-box-of-4-dr9eix","title":"NGK Iridium IX Spark Plug Box of 4 (DR9EIX)","description":"\u003ch4\u003eAn Iridium Fine-Wire Center Electrode in a Box of Four Plugs\u003c\/h4\u003e\n\u003cp\u003eNGK part number 4772 is a box of four Iridium IX spark plugs, factory-coded DR9EIX. NGK builds the Iridium IX line around a fine-wire iridium center electrode, which the manufacturer's own product description states is roughly six times harder than platinum, paired with a tapered-cut ground electrode for improved starting, idling and throttle response.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eIridium fine-wire center electrode, roughly six times harder than platinum per NGK\u003c\/li\u003e\n\u003cli\u003eTapered-cut ground electrode for improved starting, idling and throttle response\u003c\/li\u003e\n\u003cli\u003eHigh melting point iridium alloy suited to sustained high combustion-chamber temperatures\u003c\/li\u003e\n\u003cli\u003eSold as a box of four, factory-coded DR9EIX\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eFitment\u003c\/h4\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003en.a.\u003c\/td\u003e\n\u003ctd\u003en.a.\u003c\/td\u003e\n\u003ctd\u003en.a.\u003c\/td\u003e\n\u003ctd\u003eVerify physical dimensions against the application before ordering.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eNGK\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLine\u003c\/td\u003e\n\u003ctd\u003eIridium IX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFactory code\u003c\/td\u003e\n\u003ctd\u003eDR9EIX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity per box\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCenter electrode material\u003c\/td\u003e\n\u003ctd\u003eIridium, fine-wire\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGround electrode\u003c\/td\u003e\n\u003ctd\u003eTapered-cut\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003eWhat's Included\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eOne box of four NGK Iridium IX spark plugs, factory-coded DR9EIX.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eAbout NGK\u003c\/h4\u003e\n\u003cp\u003eNGK builds this product around the specifications described above; verified details are sourced from the manufacturer-provided product description supplied with this listing.\u003c\/p\u003e\n\u003ch4\u003eFAQ\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does the DR9EIX factory code identify?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNGK's own factory code for this Iridium IX spark plug; use it to cross-reference against the engine's specified heat range and thread size before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow many plugs come in this listing?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFour, sold together as one box.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is different about the Iridium IX's center electrode?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNGK describes a fine-wire iridium center electrode with a melting point and hardness NGK states is roughly six times that of platinum.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does the tapered-cut ground electrode do?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNGK states it improves starting, idling and throttle response compared with a standard ground electrode.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs vehicle-specific fitment published with this listing?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. Verify the DR9EIX heat range and thread specification against the engine's original-equipment plug.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan these be used as a direct swap for a lower NGK line?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eConfirm the exact heat range and reach against the factory-specified plug; NGK's own text does not state that Iridium IX is a drop-in for every other NGK line in every application.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat upgrade path does NGK suggest from this line?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNGK's own description suggests the Ruthenium HX line for even greater performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre these gapped from the factory or is gapping required?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eCheck the plug gap against the engine manufacturer's specification before installation.\u003c\/p\u003e\n\u003ch4\u003eInstallation Instructions\u003c\/h4\u003e\n\u003cp\u003eNGK's own product description covers plug design and material rather than a step-by-step installation or torque procedure. Use the vehicle's factory service information for torque values and removal sequence.\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eConfirm the DR9EIX factory code matches the plug specified for the engine before removing the old plugs.\u003c\/li\u003e\n\u003cli\u003eAllow the engine to cool completely before removing spark plugs.\u003c\/li\u003e\n\u003cli\u003eRemove the ignition coil or plug wire, then use a spark plug socket to remove the old plug.\u003c\/li\u003e\n\u003cli\u003eInspect the new plug's gap against the vehicle manufacturer's specification before installation; NGK does not publish a universal gap for this listing.\u003c\/li\u003e\n\u003cli\u003eThread the new plug in by hand until it seats, then torque to the vehicle manufacturer's specification using a torque wrench.\u003c\/li\u003e\n\u003cli\u003eReinstall the ignition coil or plug wire and repeat for the remaining plugs.\u003c\/li\u003e\n\u003cli\u003eStart the engine and confirm smooth idle before returning the vehicle to service.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"NGK","offers":[{"title":"Default Title","offer_id":46381099974735,"sku":"NGK4772","price":90.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/ngk-iridium-ix-spark-plug-box-of-4-dr9eix-ngk.jpg?v=1786381550","url":"https:\/\/www.blackopsautoworks.com\/products\/ngk-iridium-ix-spark-plug-box-of-4-dr9eix","provider":"Black Ops Auto Works","version":"1.0","type":"link"}