{"product_id":"ignition-coil-iridium-spark-plugs-wire-chevrolet-silverado-2500-hd-3500-hd-2020-6-6l-v8","title":"Ignition Coil \u0026 Iridium Spark Plugs \u0026 Wire Chevrolet Silverado 2500 HD 3500 HD (2020) 6.6L V8","description":"\u003ch2\u003eHigh-Energy Ignition Coil \u0026amp; Iridium Spark Plug Kit for Chevrolet Silverado\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eReplaces failing factory ignition components to restore proper combustion, eliminate misfires, and improve throttle response under heavy loads.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eThe Stock Silverado L8T Heat Soak Problem\u003c\/h3\u003e\n\u003cp\u003eThe stock Silverado L8T ignition system degrades over time due to intense thermal cycling under the hood, especially when towing or hauling heavy payloads. Continuous high-temperature exposure breaks down the factory coil epoxy and degrades spark plug electrodes, leading to increased electrical resistance. This manifests as weak spark output, engine misfires, rough idling, hesitation during acceleration, and inevitable Check Engine Light (CEL) or StabiliTrak\/VSC warnings. Left unaddressed, poor ignition efficiency accelerates fuel waste and exhaust emissions.\u003c\/p\u003e\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive ignition overhaul kit is engineered to exceed OE specifications, delivering a 20% increase in spark energy and stepping up voltage to a maximum of 26,000 Volts (61:1 turns ratio). The UF742 coils feature premium internal copper windings and high-temperature epoxy construction to resist heat soak and heavy-duty vibration. Paired with 41-114 iridium spark plugs—chosen for their extremely high melting point and superior conductivity—this setup ensures a powerful, consistent spark event. The included 8mm spark plug wires utilize a high-density silicone sleeve and specialized heat shields to eliminate RFI electronic interference and prevent cross-firing, ensuring maximum voltage transfer directly to the combustion chamber.\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;\"\u003eChevrolet Silverado 2500 HD \/ 3500 HD\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;\"\u003e6.6L V8 L8T \/ T1XX\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;\"\u003e401 hp \/ 464 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;\"\u003eUF742, 41-114, 748UU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2020 Chevrolet Silverado 2500 HD 6.6L V8 (Gasoline)\u003c\/li\u003e\n\u003cli\u003e2020 Chevrolet Silverado 3500 HD 6.6L V8 (Gasoline)\u003c\/li\u003e\n\u003cli\u003eReplaces OE Coils: 12658183, 12621750, 12674754, 12699383, 12708496, 5C1876, U5265, 48881, C1819, C866, GN10165\u003c\/li\u003e\n\u003cli\u003eReplaces OE Wires: 12192195, 12622553, 88862397, 12192192, 9748GG, 748GG, 7873\u003c\/li\u003e\n\u003cli\u003eReplaces OE Plugs: 41-114\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eThe Chevrolet Heavy-Duty Standard\u003c\/h3\u003e\n\u003cp\u003eDesigned to endure the grueling demands of heavy towing, payload hauling, and continuous job-site idling, these upgraded ignition components ensure your heavy-duty Silverado maintains optimal power delivery and reliability.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":48477711794424,"sku":"DS-EEV3M15F0","price":219.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-iridium-spark-plugs-wire-chevrolet-silverado-2500-hd-3500-hd-2020-6-6l-v8-1.jpg?v=1779379963","url":"https:\/\/performancechiptuning.com\/fr\/products\/ignition-coil-iridium-spark-plugs-wire-chevrolet-silverado-2500-hd-3500-hd-2020-6-6l-v8","provider":"Performance Chip Tuning","version":"1.0","type":"link"}