{"product_id":"ignition-coil-and-iridium-spark-plugs-for-hummer-h3-2007-2010-3-7l","title":"Ignition Coil and Iridium Spark Plugs for Hummer H3 (2007-2010) 3.7L","description":"\u003ch2\u003eHigh-Dielectric Ignition Coil and Iridium Spark Plug Kit for 2007-2010 Hummer H3\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e Restores complete combustion efficiency and eliminates cylinder misfires across the rev range by replacing deteriorated factory ignition coils and worn plugs with high-temp copper-wound assemblies and fine-wire iridium electrodes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock H3 Thermal Breakdown Weakness\u003c\/h3\u003e\n\u003cp\u003eUnder heavy engine bay heat soak common in the enclosed GMT345 engine bay, factory coil-on-plug boots and epoxy insulation degrade over time. This breakdown causes dielectric breakdown, micro-arcing, and internal copper winding resistance drift. Combined with standard plug electrode gap erosion, high thermal stress leads to intermittent misfires, rough idle harmonics, unburnt hydrocarbon build-up, and lost torque under load.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis direct-replacement ignition pack upgrades secondary voltage delivery using high-conductivity primary and secondary internal copper windings sealed in premium thermoset epoxy. Matched with fine-wire iridium-tipped center electrode spark plugs, the system requires lower firing voltage while producing a concentrated, hotter flame kernel. Direct-fit blade terminals and fortified boots provide high-temperature dielectric shielding against premature voltage leakage and moisture intrusion.\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;\"\u003e2007-2010 Hummer H3\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;\"\u003e3.7L Vortec 3700 (LLR Atlas) \/ GMT345\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;\"\u003e242 hp \/ 242 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;\"\u003eUF497, UF-497\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2007 Hummer H3 Base, Adventure, Luxury 3.7L\u003c\/li\u003e\n  \u003cli\u003e2008 Hummer H3 Base, Adventure, Luxury, X 3.7L\u003c\/li\u003e\n  \u003cli\u003e2009 Hummer H3 Base, Adventure, Luxury, X 3.7L\u003c\/li\u003e\n  \u003cli\u003e2010 Hummer H3 Base, Adventure, Luxury 3.7L\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe Hummer Heavy-Duty Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered to handle sustained off-camber trail loads, heavy towing cycles, and severe off-road vibration without spark blowout or thermal failure.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50454129246456,"sku":"DS-EDL93R6P7","price":118.95,"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-hummer-h3-2007-2010-3-7l-1.jpg?v=1788726564","url":"https:\/\/performancechiptuning.com\/fr\/products\/ignition-coil-and-iridium-spark-plugs-for-hummer-h3-2007-2010-3-7l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}