{"product_id":"ignition-coil-and-iridium-spark-plugs-for-cadillac-deville-2004-2005-4-6l","title":"Ignition Coil and Iridium Spark Plugs for Cadillac Deville (2004-2005) 4.6L","description":"\u003ch2\u003eDirect-Fit Ignition Coil and Iridium Spark Plug Kit for 2004-2005 Cadillac Deville\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003ePrimary Function:\u003c\/strong\u003e Completely refreshes the secondary ignition system to eliminate engine misfires, restore lost combustion efficiency, and stabilize idle quality across all eight cylinders.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Deville Thermal Fatigue and Dielectric Breakdown\u003c\/h3\u003e\n\u003cp\u003eThe 4.6L Northstar engine operates under tight underhood packaging, subjecting factory coil packs to prolonged thermal stress and extreme heat-soak cycles. Over time, original coil insulation and internal epoxy potting degrade, developing micro-fractures that cause dielectric breakdown. This results in high-voltage arcing to the cylinder head rather than the plug gap, triggering P0300 misfire codes, rough idling, hesitation under load, and unburned fuel entering the catalytic converters.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive 8-cylinder ignition kit replaces degraded factory components with high-dielectric epoxy housings and premium high-conductivity internal copper windings for maximum secondary voltage output. Paired with laser-welded iridium spark plugs featuring ultra-fine center electrodes, this setup lowers ignition voltage requirements, resists electrode erosion, and ensures a clean, consistent spark flame kernel under high cylinder pressures and temperatures.\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;\"\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;\"\u003e2004-2005 Cadillac Deville\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;\"\u003e4.6L Northstar V8 (LD8 \/ L37) \/ GM G-Body\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;\"\u003e275–300 hp \/ 295–300 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;\"\u003eUF564, 12597745, 12602862, 12670154, D596A, C1556\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2004 Cadillac Deville Base 4.6L V8\u003c\/li\u003e\n  \u003cli\u003e2004 Cadillac Deville DHS 4.6L V8\u003c\/li\u003e\n  \u003cli\u003e2004 Cadillac Deville DTS 4.6L V8\u003c\/li\u003e\n  \u003cli\u003e2005 Cadillac Deville Base 4.6L V8\u003c\/li\u003e\n  \u003cli\u003e2005 Cadillac Deville DHS 4.6L V8\u003c\/li\u003e\n  \u003cli\u003e2005 Cadillac Deville DTS 4.6L V8\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe Cadillac Refinement Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered to deliver seamless power delivery and quiet operation, this matched coil and iridium plug kit restores the signature velvety-smooth V8 performance expected from a flagship Cadillac luxury sedan without check engine lights.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50447752528120,"sku":"DS-E5R184PST","price":169.95,"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-cadillac-deville-2004-2005-4-6l-1.jpg?v=1788623143","url":"https:\/\/performancechiptuning.com\/products\/ignition-coil-and-iridium-spark-plugs-for-cadillac-deville-2004-2005-4-6l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}