{"product_id":"ignition-coil-iridium-spark-plugs-for-subaru-legacy-2005-2009-2-5l","title":"Ignition Coil + Iridium Spark Plugs for Subaru Legacy (2005-2009) 2.5L","description":"\u003ch2\u003eHigh-Dielectric Direct-Fit Ignition Coil \u0026amp; Iridium Spark Plug Kit for 2005-2009 Subaru Legacy\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Direct-Fit Ignition Coil and Iridium Spark Plug Kit replaces degraded factory secondary ignition components on the 2005-2009 Subaru Legacy to eliminate engine misfires, restore clean flame propagation, and stabilize idle quality.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Subaru Legacy Thermal Ignition Breakdown\u003c\/h3\u003e\n\u003cp\u003eOn the \u003cstrong\u003eBL\/BP\u003c\/strong\u003e chassis, the horizontal boxer layout packages ignition coils in close proximity to the exhaust manifolds and cylinder head heat shields. Continuous thermal cycling breaks down the factory epoxy insulation and internal copper windings within the OEM coil packs, resulting in secondary breakdown, micro-arcing, and spark blowout under load. Simultaneously, standard plugs experience ground electrode erosion, widening spark plug gaps beyond nominal limits. This elevated resistance strains the ECU ignition drivers and leads to unburned hydrocarbon accumulation, poor throttle response, and persistent \u003cstrong\u003eP0301-P0304\u003c\/strong\u003e misfire codes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis coordinated ignition kit restores balanced combustion across horizontally opposed cylinder banks. The coil packs feature high-temperature thermoplastic housings, premium magnetic silicon steel cores, and high-dielectric epoxy potting that isolates internal windings against engine-bay thermal saturation. Paired with fine-wire \u003cstrong\u003eIridium\u003c\/strong\u003e spark plugs, the kit minimizes electrical resistance and quench effects. The laser-welded iridium center electrodes maintain tight spark gaps across thousands of heat cycles, ensuring complete fuel burn, smoother transient throttle response, and seamless integration with OEM part numbers \u003cstrong\u003eUF508\u003c\/strong\u003e and \u003cstrong\u003e22433AA541\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; margin-bottom: 20px;\"\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e2005-2009 Subaru Legacy\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e\n\u003cstrong\u003eEJ25\u003c\/strong\u003e 2.5L \/ \u003cstrong\u003eBL\/BP\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e175 hp \/ 169 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e\n\u003cstrong\u003eUF508\u003c\/strong\u003e, \u003cstrong\u003eUF567\u003c\/strong\u003e, \u003cstrong\u003e22433AA541\u003c\/strong\u003e, \u003cstrong\u003e22433AA480\u003c\/strong\u003e, \u003cstrong\u003e22433AA640\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2005-2009 Subaru Legacy 2.5L\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the BL\/BP Legacy?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 2005-2009 Subaru Legacy equipped with the \u003cstrong\u003eEJ25\u003c\/strong\u003e 2.5L engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo these spark plugs require manual gapping before installation?\u003c\/strong\u003e\u003cbr\u003e No, the fine-wire iridium plugs arrive pre-set to factory clearance, though careful visual inspection is always recommended before threading into the cylinder head.\u003c\/p\u003e\n\n\u003ch3\u003eThe Subaru Boxer Standard\u003c\/h3\u003e\n\u003cp\u003eHorizontally opposed powertrains demand identical spark energy across all four combustion chambers to cancel secondary harmonics and preserve characteristic boxer output balance. Replacing ignition coils and iridium plugs together ensures synchronous dwell performance and dependable high-load reliability.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50622919606520,"sku":"DS-E8ZHVDQT1","price":197.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-iridium-spark-plugs-for-subaru-legacy-2005-2009-2-5l-1.jpg?v=1790276847","url":"https:\/\/performancechiptuning.com\/es\/products\/ignition-coil-iridium-spark-plugs-for-subaru-legacy-2005-2009-2-5l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}