{"product_id":"ignition-coil-and-iridium-spark-plugs-for-chevrolet-classic-2004-2005-2-2l","title":"Ignition Coil and Iridium Spark Plugs for Chevrolet Classic (2004-2005) 2.2L","description":"\u003ch2\u003eDirect-Fit Ignition Coil and Iridium Spark Plug Kit for 2004-2005 Chevrolet Classic\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The ignition coil rail and iridium spark plug kit restores primary and secondary ignition energy on the 2004-2005 Chevrolet Classic to eliminate cylinder misfires, stabilize idle, and maximize combustion efficiency.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Chevrolet Classic Thermal Breakdown Problem\u003c\/h3\u003e\n\u003cp\u003eThe factory ignition coil cassette on the \u003cstrong\u003eL61\u003c\/strong\u003e 2.2L Ecotec engine sits directly atop the cylinder head, exposing its internal epoxy potting and copper windings to severe radiant thermal cycling. Over miles of heat exposure, OEM coil cassettes suffer dielectric breakdown, micro-cracking along the integrated secondary boots, and subsequent secondary voltage leakage. When paired with standard copper-core plugs that suffer rapid gap erosion, the increased electrical resistance forces the aging coil pack to work harder, generating excessive internal heat that causes intermittent misfires (P0300-P0304), sluggish throttle response, and catalyst-damaging unburnt fuel delivery.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive ignition tune-up kit resolves heat-related ignition degradation by pairing a reinforced, direct-replacement coil rail with premium fine-wire iridium spark plugs. The replacement ignition rail replaces OEM part numbers \u003cstrong\u003eUF391\u003c\/strong\u003e, \u003cstrong\u003e10458422\u003c\/strong\u003e, and \u003cstrong\u003e12587426\u003c\/strong\u003e, featuring high-dielectric silicone boots, vacuum-potted epoxy insulation, and heavy-gauge magnetic copper primary and secondary windings to resist thermal shock. The included iridium spark plugs utilize a high-density, laser-welded electrode design that requires significantly lower firing voltage than traditional copper or platinum plugs. This reduced electrical demand preserves coil longevity while providing a consistent, stable spark kernel under demanding engine loads.\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;\"\u003e2004-2005 Chevrolet Classic\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;\"\u003e2.2L L61 Ecotec \/ N-body\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;\"\u003e144 hp \/ 155 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;\"\u003eUF391, 10458422, 12580538, 12587426, GN10111\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2004 Chevrolet Classic Base Sedan 2.2L L4 Gas (L61 Ecotec)\u003c\/li\u003e\n  \u003cli\u003e2005 Chevrolet Classic Base Sedan 2.2L L4 Gas (L61 Ecotec)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the N-body Classic?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 2004-2005 Chevrolet Classic equipped with the \u003cstrong\u003eL61\u003c\/strong\u003e engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo these iridium spark plugs require manual gapping before installation?\u003c\/strong\u003e\u003cbr\u003e No, these iridium spark plugs arrive pre-gapped from the factory; attempting to manually gap them can fracture the fragile iridium center electrode.\u003c\/p\u003e\n\n\u003ch3\u003eThe Chevrolet Reliability Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered for high-mileage daily driving and demanding fleet duty, the \u003cstrong\u003eN-body\u003c\/strong\u003e platform requires electrical components that withstand severe underhood thermal loads without inducing secondary misfire codes or premature wear on the catalytic converter.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50605631635704,"sku":"DS-EQ84O92Y1","price":74.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-and-iridium-spark-plugs-for-chevrolet-classic-2004-2005-2-2l-1.jpg?v=1790089862","url":"https:\/\/performancechiptuning.com\/es\/products\/ignition-coil-and-iridium-spark-plugs-for-chevrolet-classic-2004-2005-2-2l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}