{"product_id":"ignition-coil-spark-plugs-for-pontiac-gto-2004-5-7l-v8","title":"Ignition Coil \u0026 Spark Plugs for Pontiac GTO (2004) 5.7L V8","description":"\u003ch2\u003eHigh-Output Ignition Coil \u0026amp; Spark Plug Kit for Pontiac GTO\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDirect Replacement \u0026amp; Upgrade:\u003c\/strong\u003e Replaces failing factory ignition components to restore proper spark delivery, eliminate misfires, and ensure consistent voltage output across the RPM range.\u003c\/p\u003e\n\u003ch3\u003eThe Stock LS1 Ignition Shortcomings\u003c\/h3\u003e\n\u003cp\u003eThe factory D580-style ignition coils on early LS1 engines are notoriously susceptible to thermal degradation and heat soak, especially given the cramped engine bay of the V-Body chassis. Over time, constant thermal cycling causes the internal epoxy resin potting compound to degrade, leading to micro-cracks in the coil housing. This breakdown creates internal arcing, erratic secondary voltage drops, and high-RPM misfires, ultimately robbing the 5.7L of its smooth power delivery and accelerating spark plug fouling under load.\u003c\/p\u003e\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive tune-up kit addresses the OEM thermal vulnerabilities by utilizing upgraded high-temperature copper windings and an advanced dielectric epoxy designed for severe thermal environments. The re-engineered primary and secondary bobbins provide superior magnetic flux coupling, ensuring maximum energy transfer and a hotter, more consistent spark. Paired with high-grade silicone spark plug wires that resist pinhole leaks, cracking, and EMI\/RFI interference, this setup guarantees a complete combustion event. The result is a stabilized idle, restored throttle response, and optimized low-emissions output.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px;\"\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e2004 Pontiac GTO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eEngine \/ Chassis\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eLS1 5.7L V8 \/ V-Body (Holden V2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eStock Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e350 hp \/ 365 lb-ft (Approx)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eD580, 12556450, UF-192, 5C1078\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2004 Pontiac GTO 5.7L V8\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eThe Pontiac Muscle Caliber\u003c\/h3\u003e\n\u003cp\u003eFor an iconic modern muscle car like the LS1-powered GTO, maintaining peak electrical performance is critical. Upgrading your ignition system ensures that the legendary torque and aggressive V8 exhaust note remain uninterrupted by weak spark or cylinder misfires, keeping the power reliable on the street and the strip.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50065383620856,"sku":"DS-E2MZSK4I2","price":239.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-spark-plugs-for-pontiac-gto-2004-5-7l-v8-1.webp?v=1785257049","url":"https:\/\/performancechiptuning.com\/products\/ignition-coil-spark-plugs-for-pontiac-gto-2004-5-7l-v8","provider":"Performance Chip Tuning","version":"1.0","type":"link"}