{"product_id":"ngk-laser-platinum-spark-plugs-fr5ap-11-4-pack-for-subaru-forester-2-5l-2003-2010-double-platinum-14mm-0-750-reach","title":"NGK Laser Platinum Spark Plugs FR5AP-11 4-Pack for Subaru Forester 2.5L (2003–2010) — Double Platinum, 14mm 0.750\" Reach","description":"\u003cp\u003e\u003cstrong\u003eNGK Laser Platinum FR5AP-11 is a four-pack of double-platinum spark plugs engineered for long-lasting, stable ignition in 2.5L Subaru Forester X engines (2003–2010).\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis set of NGK FR5AP-11 spark plugs uses precision laser-welded platinum on both the center and ground electrodes to minimize electrode wear and reduce the voltage needed to jump the spark gap. Built to OE-acceptable tolerances, these plugs fit 14mm threads with a 0.750\" reach and gasket seat, and they include an internal resistor for radio-noise suppression. The construction combines a platinum-tipped electrode and a copper core for reliable heat transfer and consistent performance across normal driving conditions.\u003c\/p\u003e\n\n\u003ch3\u003eHow do these NGK spark plugs differ from standard copper plugs?\u003c\/h3\u003e\n\u003cp\u003eDouble platinum electrodes slow gap erosion compared with conventional copper-only tips, which helps maintain a consistent spark over a longer service interval. Laser-welded platinum discs on both electrodes create a precise, clean weld that reduces debris at the weld site and lowers the voltage required to initiate a spark.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePlatinum on both center and ground electrodes reduces wear.\u003c\/li\u003e\n  \u003cli\u003eLaser-welded joints limit excess weld material and contamination.\u003c\/li\u003e\n  \u003cli\u003eCopper core improves heat conduction from the firing tip.\u003c\/li\u003e\n  \u003cli\u003eResistor built in to minimize electromagnetic interference.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill these plugs fit my Subaru Forester X 2.5L (2003–2010)?\u003c\/h3\u003e\n\u003cp\u003eYes — the FR5AP-11 spark plugs are specified for 2.5L (2458cc) 4-cylinder applications in the Subaru Forester X model years listed. They use a 14mm thread, 0.750\" reach, and a gasket seat style matching the factory geometry for those engines.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eEngine compatibility: Subaru Forester X 2003–2010, 2.5L\/2458cc, 4-cylinder.\u003c\/li\u003e\n  \u003cli\u003eThread size: 14mm with 0.750\" reach to match factory seats.\u003c\/li\u003e\n  \u003cli\u003eSeat type: gasket; wrench diameter: 5\/8\" for installation.\u003c\/li\u003e\n  \u003cli\u003eSold as a 4-pack to service an entire inline-four cylinder bank.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow long do NGK laser platinum plugs typically last and what maintenance is needed?\u003c\/h3\u003e\n\u003cp\u003ePlatinum electrodes generally offer longer service life than copper plugs because they resist erosion at the firing tip. Inspection intervals depend on driving conditions, but many users follow intervals recommended by vehicle manufacturers for platinum types and check spark plug condition during routine tune-ups.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDouble-platinum design reduces gap widening over time.\u003c\/li\u003e\n  \u003cli\u003eInspect for fouling, electrode wear, or improper gap during maintenance.\u003c\/li\u003e\n  \u003cli\u003eFollow Subaru’s recommended replacement interval for platinum plugs where specified.\u003c\/li\u003e\n  \u003cli\u003eUse correct torque and a 5\/8\" socket for installation to protect the gasket seat.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAre these NGK plugs easy to install and what tools are required?\u003c\/h3\u003e\n\u003cp\u003eInstallation is straightforward for anyone familiar with basic spark plug service: reach spark plug wells, remove ignition coils or wires, and install with the correct torque. Use a 5\/8\" spark plug socket and a torque wrench to ensure the gasket seat compresses properly and avoid overtightening.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRequired socket: 5\/8\" spark plug socket fits wrench diameter.\u003c\/li\u003e\n  \u003cli\u003eUse a torque wrench to achieve manufacturer torque specs.\u003c\/li\u003e\n  \u003cli\u003eClean spark plug wells before removal to prevent debris entering the cylinder.\u003c\/li\u003e\n  \u003cli\u003eReplace all four plugs at once for consistent ignition across cylinders.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Drivers and DIY mechanics who own a Subaru Forester X (2003–2010) with the 2.5L 4-cylinder engine and want OE-compatible replacements that prioritize electrode longevity and stable spark performance. These NGK FR5AP-11 plugs suit routine maintenance, tune-ups, and anyone seeking a longer-lasting alternative to plain-copper spark plugs while retaining factory fit and function.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are these NGK plugs compatible with Subaru Forester X 2.5L engines?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The FR5AP-11 fits Subaru Forester X 2003–2010 2.5L (2458cc) 4-cylinder engines with 14mm threads and 0.750\" reach.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do these spark plugs require a special gap or heat range?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: They use NGK's manufacturer heat range 5 and are pre-gapped; verify gap per your vehicle manual before installation.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"NGK","offers":[{"title":"Default Title","offer_id":48086782607518,"sku":"B07VCNK2MW","price":59.69,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/ngk-fr5ap-11-front-packaging.jpg?v=1785904962","url":"https:\/\/northtrailauto.ca\/products\/ngk-laser-platinum-spark-plugs-fr5ap-11-4-pack-for-subaru-forester-2-5l-2003-2010-double-platinum-14mm-0-750-reach","provider":"North Trail Auto","version":"1.0","type":"link"}