{"product_id":"ngk-ngk9198-cpr7eaix-9-iridium-ix-spark-plug-box-of-4","title":"NGK Iridium IX Spark Plug Box of 4 (CPR7EAIX-9)","description":"\u003ch4\u003e0.6mm Iridium Fine Wire Ignition in a Box of Four NGK CPR7EAIX-9 Plugs\u003c\/h4\u003e\n\u003cp\u003eThe NGK CPR7EAIX-9 Iridium IX spark plug (NGK9198) is engineered for performance enthusiasts who demand consistent ignition, improved throttle response, and extended service life beyond what standard nickel alloy plugs can deliver. The 0.6mm iridium fine wire center electrode produces a concentrated, stable spark with minimal voltage demand, while the tapered cut ground electrode reduces quenching for stronger combustion at every RPM. Sold as a box of four, NGK9198 is a direct replacement for applications specifying the M10 x 1.0mm thread, 19mm reach, heat range 7 plug with a gasket seat.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e0.6mm iridium fine wire center electrode for a concentrated, stable spark\u003c\/li\u003e\n\u003cli\u003eIridium alloy melting point far exceeds platinum, delivering up to 50,000-mile service life\u003c\/li\u003e\n\u003cli\u003eIridium center electrode is six times harder and eight times stronger than platinum\u003c\/li\u003e\n\u003cli\u003eTapered cut ground electrode reduces quenching and improves ignitability\u003c\/li\u003e\n\u003cli\u003eSolid copper core provides superior heat dissipation across a wide heat range\u003c\/li\u003e\n\u003cli\u003eTrivalent metal plating offers anti-corrosion and anti-seizing protection\u003c\/li\u003e\n\u003cli\u003eCorrugated ribs on the insulator prevent flashover\u003c\/li\u003e\n\u003cli\u003ePure alumina silicate ceramic insulator for superior strength and thermal transfer\u003c\/li\u003e\n\u003cli\u003eTriple seals prevent combustion gas leakage\u003c\/li\u003e\n\u003cli\u003e5k Ohm resistor suppresses EMI\/RFI interference\u003c\/li\u003e\n\u003cli\u003eFactory pre-gapped at 0.035 in (0.9mm)\u003c\/li\u003e\n\u003cli\u003eSold as a box of four plugs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003eCPR7EAIX-9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNGK Stock Number\u003c\/td\u003e\n\u003ctd\u003e9198\u003c\/td\u003e\n\u003c\/tr\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\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eIridium IX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread Diameter\u003c\/td\u003e\n\u003ctd\u003e10mm (M10)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread Pitch\u003c\/td\u003e\n\u003ctd\u003e1.0mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeat Type\u003c\/td\u003e\n\u003ctd\u003eGasket (Flat)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReach\u003c\/td\u003e\n\u003ctd\u003e19mm (3\/4 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHex Size\u003c\/td\u003e\n\u003ctd\u003e5\/8 in (16mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Type\u003c\/td\u003e\n\u003ctd\u003eThreaded Stud\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGap\u003c\/td\u003e\n\u003ctd\u003e0.035 in (0.9mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCenter Electrode\u003c\/td\u003e\n\u003ctd\u003eIridium Fine Wire, 0.6mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGround Electrode\u003c\/td\u003e\n\u003ctd\u003eNickel, Taper Cut\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat Range\u003c\/td\u003e\n\u003ctd\u003e7\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\u003eTorque (Cast Iron Head)\u003c\/td\u003e\n\u003ctd\u003e7.2 to 10.8 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTorque (Aluminum Head)\u003c\/td\u003e\n\u003ctd\u003e7.2 to 8.7 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLongevity\u003c\/td\u003e\n\u003ctd\u003eUp to 50,000 miles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e60 Days\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003eBox of 4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch4\u003eWhat's Included\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e4 x NGK CPR7EAIX-9 Iridium IX Spark Plugs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eFrequently Asked Questions\u003c\/h4\u003e\n\u003cstrong\u003eWhat does the NGK part number CPR7EAIX-9 (NGK9198) tell me about the plug?\u003c\/strong\u003e\n\u003cp\u003eIn the NGK naming system: C indicates the thread diameter (10mm), P indicates the projected insulator tip, R indicates a built-in resistor, 7 is the heat range, E indicates the thread reach (19mm), A is the thread pitch (1.0mm), I indicates the iridium center electrode, X indicates a tapered cut ground electrode, and 9 indicates the pre-set gap (0.9mm). Together these define a 10mm, 19mm reach, resistor, iridium IX plug with a tapered cut ground and a 0.9mm gap.\u003c\/p\u003e\n\n\u003cstrong\u003eHow long do NGK CPR7EAIX-9 iridium spark plugs last?\u003c\/strong\u003e\n\u003cp\u003eNGK rates the Iridium IX series for up to 50,000 miles of service. Actual longevity depends on engine type, fuel quality, oil consumption, and operating conditions. Modified or forced-induction engines running rich or with increased cylinder pressure may shorten service intervals.\u003c\/p\u003e\n\n\u003cstrong\u003eShould I re-gap the NGK CPR7EAIX-9 before installation?\u003c\/strong\u003e\n\u003cp\u003eNGK does not recommend gapping Iridium IX plugs after the factory pre-set. The 0.6mm iridium center electrode is extremely fine and can be damaged or fractured by gapping tools. The NGK9198 arrives pre-gapped at 0.035 in (0.9mm) and should be installed as-is unless your specific application requires a different gap and you use an appropriate thin wire gauge tool with extreme care.\u003c\/p\u003e\n\n\u003cstrong\u003eWhat is the difference between NGK Iridium IX and NGK Laser Iridium or Platinum plugs?\u003c\/strong\u003e\n\u003cp\u003eNGK Iridium IX uses an iridium fine wire center electrode with a nickel taper cut ground electrode and is designed for performance and modified applications. NGK Laser Iridium uses iridium on both the center and ground electrodes, making it a more premium OEM-replacement option. Platinum plugs use a platinum tip center electrode, which is softer than iridium, and are generally positioned as a mid-grade upgrade over standard copper plugs.\u003c\/p\u003e\n\n\u003cstrong\u003eIs the NGK CPR7EAIX-9 a resistor spark plug?\u003c\/strong\u003e\n\u003cp\u003eYes. The R in the NGK part number indicates a built-in 5,000-ohm resistor. The resistor suppresses electromagnetic interference (EMI) and radio frequency interference (RFI) that can affect onboard electronics, sensors, and ignition control modules in modern vehicles and powersports equipment.\u003c\/p\u003e\n\n\u003cstrong\u003eWhat torque should I use when installing NGK9198 spark plugs?\u003c\/strong\u003e\n\u003cp\u003eFor cast iron cylinder heads, torque to 7.2 to 10.8 lb-ft. For aluminum cylinder heads, torque to 7.2 to 8.7 lb-ft. Always install plugs finger-tight first to confirm threads are not cross-threaded before applying final torque. Do not overtighten, as this can crush the gasket seat excessively and damage the plug or head threads.\u003c\/p\u003e\n\n\u003cstrong\u003eCan NGK CPR7EAIX-9 plugs be used in turbocharged or supercharged engines?\u003c\/strong\u003e\n\u003cp\u003eThe NGK Iridium IX series is suitable for modified and performance applications including mild forced induction. For high-boost or high-cylinder-pressure applications, a colder heat range plug may be needed to prevent pre-ignition. Consult your engine builder or tuner to confirm heat range suitability for your specific power level and boost pressure.\u003c\/p\u003e\n\n\u003cstrong\u003eWhy does this listing sell four NGK CPR7EAIX-9 plugs instead of one?\u003c\/strong\u003e\n\u003cp\u003eMost four-cylinder engines require four spark plugs for a complete service. Selling NGK9198 as a box of four allows you to complete a full spark plug replacement in a single purchase without needing to order multiple individual units, reducing shipping costs and ensuring a matched set from the same production batch.\u003c\/p\u003e\n\n\u003ch4\u003eInstallation Instructions\u003c\/h4\u003e\n\u003col\u003e\n\u003cli\u003eAllow the engine to cool fully before beginning spark plug replacement to avoid burns and thermal thread damage.\u003c\/li\u003e\n\u003cli\u003eRemove the ignition coil or spark plug wire from each plug location.\u003c\/li\u003e\n\u003cli\u003eUse a spark plug socket (5\/8 in \/ 16mm) with a ratchet and extension to loosen and remove each existing plug.\u003c\/li\u003e\n\u003cli\u003eInspect the old plugs for signs of oil fouling, overheating, or unusual wear that may indicate an underlying engine issue.\u003c\/li\u003e\n\u003cli\u003eThread each NGK CPR7EAIX-9 plug in by hand first to confirm proper thread engagement and avoid cross-threading.\u003c\/li\u003e\n\u003cli\u003eTorque to 7.2 to 10.8 lb-ft for cast iron heads or 7.2 to 8.7 lb-ft for aluminum heads.\u003c\/li\u003e\n\u003cli\u003eReconnect each ignition coil or spark plug wire, ensuring a firm connection.\u003c\/li\u003e\n\u003cli\u003eStart the engine and verify smooth idle with no misfire codes before returning to service.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003cp\u003e\u003cstrong\u003eWARNING:\u003c\/strong\u003e This product can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov.\u003c\/p\u003e","brand":"NGK","offers":[{"title":"Default Title","offer_id":46006904520783,"sku":"NGK9198","price":30.08,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/ngk-9198-cpr7eaix-9-iridium-ix-spark-plugs-box-of-4.png?v=1783085139","url":"https:\/\/www.blackopsautoworks.com\/products\/ngk-ngk9198-cpr7eaix-9-iridium-ix-spark-plug-box-of-4","provider":"Black Ops Auto Works","version":"1.0","type":"link"}