{"product_id":"ngk-5258-spark-plug","title":"NGK 5258 Spark Plug","description":"\u003ch2\u003eLaser Iridium Spark Plug Overview\u003c\/h2\u003e\u003cp\u003eThe NGK Laser Iridium Spark Plug 5258 is built for precise ignition performance and OE-style serviceability. It features an iridium center electrode, nickel ground electrode, and a 0.036 pre-gap for consistent spark delivery. Compatible with Ferrari F40 applications listed below, this spark plug is a direct-fit option for owners looking for the correct replacement specification.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eLaser Iridium design with an iridium center electrode for stable ignition performance.\u003c\/li\u003e\n\u003cli\u003eCopper core center electrode and nickel ground electrode for balanced heat transfer and durability.\u003c\/li\u003e\n\u003cli\u003e0.036 pre-gap and 5000 resistance for controlled spark output.\u003c\/li\u003e\n\u003cli\u003eFlat seat, 10.00 mm thread diameter, and 0.75 reach for the specified application.\u003c\/li\u003e\n\u003cli\u003eNGK part number 5258, also identified as CR8EIB-9.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eNGK 5258 is a Laser Iridium spark plug engineered to match the original equipment standards expected in performance and specialty applications. The tapered-cut ground electrode, standard ground configuration, and non-removable nut terminal support reliable ignition contact, while the iridium tip helps maintain consistent firing characteristics over service life. This part cross-references 09482-00594 for the same application. For buyers searching for a Ferrari F40 spark plug replacement, NGK 5258 provides the specified dimensions and electrode construction needed for proper fitment.\u003c\/p\u003e\u003ch2\u003eWhat It Helps Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMisfires caused by worn or incorrect spark plug construction.\u003c\/li\u003e\n\u003cli\u003eHard starting related to weak or inconsistent spark delivery.\u003c\/li\u003e\n\u003cli\u003eRough idle from degraded ignition performance.\u003c\/li\u003e\n\u003cli\u003eLoss of throttle response from improper plug gap or heat range.\u003c\/li\u003e\n\u003cli\u003eService replacement needs for the listed Ferrari F40 applications.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eFits 1990-1992 Ferrari F40, N\/A. Verify thread diameter, reach, seat type, and pre-gap before installation. Use the specified gap and follow the vehicle service procedure for torque and ignition system inspection. Confirm NGK 5258 and CR8EIB-9 against the removed plug or service data before final installation.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eNGK is a major OE spark plug supplier in North America with more than 80 years of automotive manufacturing experience. The brand emphasizes original equipment standards, durability, and operational performance in its spark plug production.\u003c\/p\u003e","brand":"NGK","offers":[{"title":"Default Title","offer_id":53725764092085,"sku":"BCDP-5258","price":16.72,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NG_5258_Fro.jpg?v=1794209683","url":"https:\/\/www.partcatalog.com\/products\/ngk-5258-spark-plug","provider":"PartCatalog","version":"1.0","type":"link"}