{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"d4c1248dc0d6","name":"NGK SPARK PLUG CR9EIX 3521 NG3521","sku":"37-CR9EIX","brand":"NGK","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":165,"price":{"amount":16.15,"formatted":"£16.15"},"summary":"NGK SPARK PLUG CR9EIX 3521 NG3521. Features an iridium alloy electrode 25% smaller than platinum and 1/4 the size of a conventional nickel electrode for superior ignition performance and efficiency. Fine wire center electrode reduces voltage requirements for ignition, extending the lifespan of your ignition system and providing a more reliable spark. High melting point iridium is ideal for high-performance engines. Corrosion-resistant trivalent metal plating enhances durability. Corrugated ribs prevent flashover and improve spark stability. Superior ceramic insulator made from pure alumina silicate ensures high strength and better heat transfer. Specifications include Heat Range: 9, Thread Size: 10 mm, Type: Resistor, Units: Sold individually, Weight: 0.12 lbs, Alternate/OEM Part Numbers: 3521, CR9EIX, Electrode Material: Iridium (fine wire center electrode), Hex Size: 5/8\" (16mm), Reach: 19mm (3/4\"), Seat Type: Gasket Seat, Gap: 0.031\" (0.8mm), Terminal Type: Stud Terminal Threads, Plating: Trivalent metal plating, Seal Type: Triple Seals. Benefits include improved engine performance, enhanced durability, better fuel efficiency, and heat management.","attributes":[{"label":"General Product Group","value":"Ignition & Electrical Parts"},{"label":"General Product Type","value":"Spark Plug"},{"label":"Variant Id","value":"235562"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/37-CR9EIX/343aa6cf5398010e.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/37-CR9EIX/343aa6cf5398010e.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/37-CR9EIX/ed0f10f98ed48d87.jpg"],"description":"NGK SPARK PLUG CR9EIX 3521 NG3521. Features an iridium alloy electrode 25% smaller than platinum and 1/4 the size of a conventional nickel electrode for superior ignition performance and efficiency. Fine wire center electrode reduces voltage requirements for ignition, extending the lifespan of your ignition system and providing a more reliable spark. High melting point iridium is ideal for high-performance engines. Corrosion-resistant trivalent metal plating enhances durability. Corrugated ribs prevent flashover and improve spark stability. Superior ceramic insulator made from pure alumina silicate ensures high strength and better heat transfer. Specifications include Heat Range: 9, Thread Size: 10 mm, Type: Resistor, Units: Sold individually, Weight: 0.12 lbs, Alternate/OEM Part Numbers: 3521, CR9EIX, Electrode Material: Iridium (fine wire center electrode), Hex Size: 5/8\" (16mm), Reach: 19mm (3/4\"), Seat Type: Gasket Seat, Gap: 0.031\" (0.8mm), Terminal Type: Stud Terminal Threads, Plating: Trivalent metal plating, Seal Type: Triple Seals. Benefits include improved engine performance, enhanced durability, better fuel efficiency, and heat management.","descriptionMarkdown":"**NGK Iridium IX Spark Plug - CR9EIX**\n\n### Key Features:\n\n\t\n- Iridium Alloy Electrode: Features a highly advanced iridium electrode that is 25% smaller than platinum and 1/4 the size of a conventional nickel electrode, enabling superior ignition performance and efficiency.\n\t\n- Fine Wire Center Electrode: Reduces voltage requirements for ignition, extending the lifespan of your ignition system and providing a more reliable spark.\n\t\n- High Melting Point: Iridium has a very high melting point, ideal for today's high-performance engines, ensuring durability under extreme conditions.\n\t\n- Corrosion-Resistant Plating: The metal shell plating has enhanced anti-corrosion properties, ensuring the spark plug lasts longer and remains reliable.\n\t\n- Corrugated Ribs: Prevents flashover and improves the stability of the spark.\n\t\n- Superior Ceramic Insulator: Made from pure alumina silicate, ensuring high strength and better heat transfer for long-lasting performance.\n\n### Specifications:\n\n\t\n- Heat Range: 9\n\t\n- Thread Size: 10 mm\n\t\n- Type: Resistor\n\t\n- Units: Sold individually\n\t\n- Weight: 0.12 lbs\n\t\n- Electrode Material: Iridium (fine wire center electrode)\n\t\n- Hex Size: 5/8\" (16mm)\n\t\n- Reach: 19mm (3/4\")\n\t\n- Seat Type: Gasket Seat\n\t\n- Gap: 0.031\" (0.8mm)\n\t\n- Terminal Type: Stud Terminal Threads\n\t\n- Plating: Trivalent metal plating for corrosion resistance\n\t\n- Seal Type: Triple Seals\n\n### Benefits:\n\n\t\n- Improved Engine Performance: The fine wire center electrode and iridium material ensure a more efficient spark, leading to better acceleration, throttle response, and overall performance.\n\t\n- Enhanced Durability: The high-quality iridium electrode and anti-corrosion features ensure a longer lifespan, reducing the frequency of spark plug replacements.\n\t\n- Better Fuel Efficiency: The improved ignition system reduces misfires and optimizes combustion, improving fuel efficiency and reducing emissions.\n\t\n- Heat Management: The superior heat transfer properties of the ceramic insulator and copper core ensure that the spark plug performs well under high-temperature conditions, preventing overheating and ensuring consistent performance.\n\n### Overview:\n\nThe **NGK Iridium IX Spark Plug - CR9EIX** is designed for performance enthusiasts who demand the best from their engine's ignition system. This spark plug provides the reliability, durability, and performance needed for top-level engine efficiency. The iridium center electrode, combined with advanced materials and design, makes it a top choice for anyone seeking enhanced engine performance and fuel efficiency.","weightGrams":null,"fitments":[{"make":"BMW","model":"G X 450","cc":null,"notes":null,"years":"2008–2021"},{"make":"GAS-GAS","model":"EC F 300","cc":null,"notes":null,"years":"2013–2021"},{"make":"HUSABERG","model":"FE 250","cc":null,"notes":null,"years":"2013"},{"make":"HUSQVARNA","model":"SM RR 450","cc":null,"notes":null,"years":"2008–2021"},{"make":"HUSQVARNA","model":"TC 449","cc":null,"notes":null,"years":"2011–2012"},{"make":"HUSQVARNA","model":"TE 250","cc":null,"notes":null,"years":"2010–2012"},{"make":"HUSQVARNA","model":"TE 449","cc":null,"notes":null,"years":"2011–2012"},{"make":"HUSQVARNA","model":"TE 511","cc":null,"notes":null,"years":"2011–2021"},{"make":"HUSQVARNA","model":"TXC 250","cc":null,"notes":null,"years":"2010–2021"},{"make":"KTM","model":"250 SX-F","cc":null,"notes":null,"years":"2006–2012"},{"make":"KTM","model":"250 XC-F","cc":null,"notes":null,"years":"2011"},{"make":"KTM","model":"250 XCF-W","cc":null,"notes":null,"years":"2013"},{"make":"KTM","model":"450 Rally Factory Replica","cc":null,"notes":null,"years":"2014"},{"make":"KTM","model":"450 SX-F","cc":null,"notes":null,"years":"2007–2012"},{"make":"KTM","model":"505 SX-F","cc":null,"notes":null,"years":"2007–2008"},{"make":"KTM","model":"505 XC-F","cc":null,"notes":null,"years":"2009"},{"make":"SUZUKI","model":"DR SE 350","cc":null,"notes":null,"years":"1994–1999"},{"make":"YAMAHA","model":"TT 250R","cc":null,"notes":null,"years":"2003–2005"},{"make":"YAMAHA","model":"WR 250F","cc":null,"notes":null,"years":"2007–2013"},{"make":"YAMAHA","model":"WR R 250","cc":null,"notes":null,"years":"2008–2020"},{"make":"YAMAHA","model":"WR X 250","cc":null,"notes":null,"years":"2008–2011"}],"collections":[{"name":"Ignition & Electrical Parts","url":"https://www.2brosparts.com/api/agent/collection/GB/ignition-electrical-parts"},{"name":"Spark Plug","url":"https://www.2brosparts.com/api/agent/collection/GB/spark-plug"}],"links":{"page":"https://www.2brosparts.com/products/ngk-spark-plug-cr9eix-3521-ng3521","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/d4c1248dc0d6:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/d4c1248dc0d6:1"}},"market":{"country":"GB","countryName":"United Kingdom","locale":"en-gb","currency":"GBP","exchangeRateFromGbp":1,"pricesIncludeUkVat":true,"checkoutTax":null,"delivery":[{"name":"Standard","description":"Orders £15.00–£59.99 · 2–4 business days","carrier":null,"estimatedDays":"2–4 business days","price":{"amount":4.99,"formatted":"£4.99"},"free":false,"minimumOrder":{"amount":0,"formatted":"£0.00","gbp":0},"weightGrams":null},{"name":"Standard","description":"Orders £60.00 and up · 2–4 business days","carrier":null,"estimatedDays":"2–4 business days","price":{"amount":0,"formatted":"£0.00"},"free":true,"minimumOrder":{"amount":60,"formatted":"£60.00","gbp":60},"weightGrams":null}],"storeUrl":"https://www.2brosparts.com"},"navigate":{"start":"https://www.2brosparts.com/api/agent","search":"https://www.2brosparts.com/api/agent/search/GB/{words+joined+with+plus}"},"howToBuy":{"summary":"Build a basket for the shopper and give them one checkout link. 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Each product also has links.buyOneNow, a ready link for one unit.","stateless":"Nothing is saved on our side. The items part of the URL is the whole basket: to change it, write the link again with the new list.","itemsFormat":"basketKey:quantity pairs joined by commas, e.g. 04f24aad4d68:2,7c1e9a0b3f2d:1. Quantity defaults to 1. Up to 50 products, 100 each.","country":"GB is the shopper's delivery country. Swap it for theirs (US, DE, FR…) in any URL; currency, tax and delivery follow it.","tips":["Put everything the shopper wants in one link.","Optionally add your name as a last path segment on checkout links (…/checkout/GB/<items>/claude) so the sale is credited to you.","The checkout link is for the shopper's browser. Do not open it yourself.","Signed-in trade account holders see their trade prices at checkout."]}}