{"product_id":"ngk-cr9eix-3521-iridium-ix-spark-plugs-pack-of-3","title":"NGK CR9EIX 3521 Iridium IX Spark Plugs Pack of 3","description":"\u003ch2\u003eNGK CR9EIX Iridium IX Pack of 3 – NGK CR9EIX Iridium IX Spark Plugs x3\u003c\/h2\u003e\u003cp\u003ePack of \u003cstrong\u003e3 genuine NGK CR9EIX Iridium IX spark plugs\u003c\/strong\u003e, NGK stock number \u003cstrong\u003e3521\u003c\/strong\u003e. The three-pack is particularly useful for compatible three-cylinder motorcycles where all plugs are replaced as a set.\u003c\/p\u003e\u003ch3\u003eWhat You Receive\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e3 x genuine NGK CR9EIX Iridium IX spark plugs\u003c\/li\u003e\n\u003cli\u003eNGK retail packaging \/ identification as shown in the product image\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCR9EIX Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNGK plug code:\u003c\/strong\u003e CR9EIX\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNGK stock \/ manufacturer number:\u003c\/strong\u003e 3521\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRange:\u003c\/strong\u003e Iridium IX\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 3 genuine NGK spark plugs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread diameter:\u003c\/strong\u003e 10 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread pitch:\u003c\/strong\u003e 1.0 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread reach:\u003c\/strong\u003e 19 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHex \/ wrench size:\u003c\/strong\u003e 16 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeat range:\u003c\/strong\u003e 9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResistor type:\u003c\/strong\u003e yes (R in CR9EIX)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeat:\u003c\/strong\u003e gasket \/ flat-seat type\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCentre electrode:\u003c\/strong\u003e fine-wire iridium, approximately 0.6 mm\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhy Iridium IX?\u003c\/h3\u003e\u003cp\u003eNGK uses a very fine iridium centre electrode to improve ignitability while resisting spark erosion. NGK lists CR9EIX as the advanced iridium option for many applications that use a CR9E\/CR9EK-family standard plug.\u003c\/p\u003e\u003ch3\u003eFitment Guide\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGeneral application:\u003c\/strong\u003e CR9EIX is used across many motorcycles, scooters and powersports engines. Confirm CR9EIX \/ NGK 3521 against the exact vehicle before ordering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree-cylinder motorcycles:\u003c\/strong\u003e this three-pack is an ideal service quantity where NGK specifies one CR9EIX per cylinder.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVerified Triumph examples:\u003c\/strong\u003e Trident\/Tiger Sport\/Daytona 660, selected Daytona\/Street Triple 675, Tiger 800, Tiger 900, and selected 955 triples are covered in the model-specific draft listings created with this export.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFitment confidence:\u003c\/strong\u003e High for the plug identity\/specification; vehicle fitment must be checked by exact model\/year.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpark-gap note:\u003c\/strong\u003e The correct installed gap is application-specific. Verified Triumph CR9EIX applications below commonly use 0.7 mm, while some 955 applications use 0.6 mm.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e CR9EIX is not interchangeable with every plug that shares a 10 mm thread. Use CR9EIX \/ stock 3521 as the compatibility key.\u003c\/p\u003e\u003ch3\u003eManufacturer \/ Cross-References\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNGK CR9EIX\u003c\/strong\u003e – primary plug code\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNGK 3521\u003c\/strong\u003e – NGK stock \/ manufacturer number\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNGK CR9EK \/ stock 4548\u003c\/strong\u003e – standard NGK plug used on many of the verified Triumph three-cylinder applications below; CR9EIX is the NGK advanced iridium option\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eVehicle manufacturers may assign their own service part numbers, but \u003cstrong\u003eCR9EIX \/ 3521\u003c\/strong\u003e is the key manufacturer identification for this genuine NGK product.\u003c\/p\u003e\u003ch3\u003eBefore Ordering\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eCheck the existing spark-plug code or the NGK\/Niterra application finder for your exact model and year.\u003c\/li\u003e\n\u003cli\u003eDo not order purely by engine capacity: motorcycles with the same capacity can use different heat ranges, reach, electrode styles or factory gaps.\u003c\/li\u003e\n\u003cli\u003eThis listing contains \u003cstrong\u003ethree plugs\u003c\/strong\u003e. Confirm your engine requires three if buying a complete service set.\u003c\/li\u003e\n\u003cli\u003eDo not substitute CR9EIX for CR9EIA-9, CR8EIX, DPR8EIX-9 or other visually similar NGK plugs unless the manufacturer\/application data explicitly permits it.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitting Note\u003c\/h3\u003e\u003cp\u003eInstall spark plugs into a cool cylinder head using the correct tightening method for the engine manufacturer. Start the plug by hand to avoid cross-threading, and do not alter the factory electrode position unless the vehicle specification specifically requires a gap check\/adjustment.\u003c\/p\u003e\u003ch3\u003eDelivery \u0026amp; Returns\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFree UK delivery with an estimated 2–3 working-day service\u003c\/li\u003e\n\u003cli\u003e30-day returns, subject to the plugs remaining unused and in resalable condition\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"NGK","offers":[{"title":"Default Title","offer_id":57428427473271,"sku":"CR9EIX X 3","price":30.0,"currency_code":"SHP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0528\/8771\/6007\/files\/20260719_172830_8e4f6650-db83-4990-bf1e-781e51160438.jpg?v=1788262717","url":"https:\/\/www.motomaniauk.com\/products\/ngk-cr9eix-3521-iridium-ix-spark-plugs-pack-of-3","provider":"Moto Mania UK","version":"1.0","type":"link"}