{"product_id":"ignition-coil-spark-plugs-for-chevrolet-optra-2004-2007-2-0l","title":"Ignition Coil + Spark Plugs for Chevrolet Optra (2004-2007) 2.0L","description":"\u003ch2\u003eDirect-Fit Ignition Coil and Spark Plug Tune-Up Kit for 2004-2007 Chevrolet Optra\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The ignition coil and spark plug kit restores secondary ignition voltage and combustion efficiency on the 2004-2007 Chevrolet Optra to eliminate engine misfires, rough idle, and hesitation under load.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Chevrolet Optra Coil Degradation and Spark Erosion\u003c\/h3\u003e\n\u003cp\u003eThe factory 4-tower waste-spark coil pack on the \u003cstrong\u003eJ200\u003c\/strong\u003e platform is mounted directly to the cylinder head bracket, subjecting the unit to persistent thermal cycling and engine vibration. Over time, heat soak degrades the internal epoxy encapsulation, creating micro-fissures across the primary and secondary copper windings. This dielectric breakdown allows high-voltage flashover and internal arcing under heavy engine load. Concurrently, factory copper core plugs suffer from accelerated ground electrode erosion and expanded plug gaps, increasing resistance across the secondary ignition circuit. This excessive resistance overburdens the driver circuits, triggering erratic combustion events, unburnt hydrocarbon build-up, catalyst degradation, and recurring P0300 through P0304 DTC misfire codes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis replacement ignition kit pairs a high-dielectric reinforced ignition coil with a calibrated set of direct-fit spark plugs engineered for the \u003cstrong\u003eT20SED\u003c\/strong\u003e DOHC engine. Built with premium epoxy potting and heavy-gauge copper winding wire, the coil assembly prevents core saturation and resists dielectric puncture up to extreme underhood operating temperatures. The integrated 4-pin male terminal interface features corrosion-resistant tin plating to maintain low contact resistance with the factory wiring harness. Matched spark plugs feature precision-machined threads, rolled-thread anti-galling coatings, and factory-preset gaps to reduce the required breakdown voltage. Replacing both the coil pack and plugs concurrently eliminates secondary voltage leakage, restores balanced cylinder-to-cylinder flame propagation, and stabilizes idle vacuum.\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;\"\u003e2004-2007 Chevrolet Optra\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\u003eT20SED\u003c\/strong\u003e 2.0L DOHC \/ \u003cstrong\u003eJ200\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;\"\u003e119 hp \/ 126 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\u003eUF356\u003c\/strong\u003e, \u003cstrong\u003e96350585\u003c\/strong\u003e, \u003cstrong\u003e25184291\u003c\/strong\u003e, \u003cstrong\u003e1104038\u003c\/strong\u003e, \u003cstrong\u003e7092\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\u003e2004 Chevrolet Optra Base 2.0L L4 Gas (J200)\u003c\/li\u003e\n  \u003cli\u003e2005 Chevrolet Optra Base, LS, LT 2.0L L4 Gas (J200)\u003c\/li\u003e\n  \u003cli\u003e2006 Chevrolet Optra Base, LS, LT 2.0L L4 Gas (J200)\u003c\/li\u003e\n  \u003cli\u003e2007 Chevrolet Optra Base, LS, LT 2.0L L4 Gas (J200)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the J200 Optra?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 2004-2007 Chevrolet Optra equipped with the \u003cstrong\u003eT20SED\u003c\/strong\u003e 2.0L DOHC engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre secondary ignition spark plug wires included in this assembly?\u003c\/strong\u003e\u003cbr\u003e No, high-tension spark plug lead wires are not included and should be inspected for dielectric breakdown or replaced separately during installation.\u003c\/p\u003e\n\n\u003ch3\u003eThe Chevrolet Reliability Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered for dependable daily operation, this direct-fit ignition component meets OEM thermal resilience standards to deliver consistent spark arc duration and protect your emissions system from catalytic converter fouling.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50623718818040,"sku":"DS-E3ZLQTJ2T","price":78.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-spark-plugs-for-chevrolet-optra-2004-2007-2-0l-1.jpg?v=1790298940","url":"https:\/\/performancechiptuning.com\/products\/ignition-coil-spark-plugs-for-chevrolet-optra-2004-2007-2-0l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}