{"product_id":"ignition-coil-spark-plug-for-hummer-h2-h3-h3t-2008-2010-v8-round-style","title":"Ignition Coil \u0026 Spark Plug for Hummer H2 H3 H3T (2008-2010) V8 (Round Style)","description":"\u003ch2\u003eDirect Replacement Ignition Coil \u0026amp; Spark Plug Set for 2008-2010 Hummer H2, H3\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eReplaces degrading factory ignition coils and plugs to restore spark energy, resolve misfires, and ensure consistent combustion under heavy engine loads.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock H2 \u0026amp; H3 Ignition Weakness\u003c\/h3\u003e\n\u003cp\u003eThe stock GM Gen IV V8 ignition coils, particularly on the GMT820 and GMT345 platforms, are highly prone to thermal degradation over extended high-mileage heat cycles. The factory epoxy inside the OEM round-style coil breaks down over time, leading to internal short-circuiting and increased primary resistance. As the coil's internal resistance builds, overall spark output significantly drops. This lack of voltage results in rough idling, severe under-load misfires, and delayed throttle response—especially noticeable when towing or navigating low-speed off-road obstacles where engine bay airflow is limited and heat soak is severe.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive ignition overhaul kit directly addresses factory thermal vulnerabilities. The included UF414 \/ D514A round-style coils are constructed with a high-grade thermal epoxy core and enhanced copper internal windings to effectively manage and dissipate intense engine bay temperatures. Delivering a maximum output of 32,000 volts with a 20% measurable increase in spark energy over standard OE units, this plug-and-play assembly maximizes combustion efficiency. The set also includes premium silicone spark plug wires (748UU) and matched spark plugs (41962), ensuring a seamless, high-amperage transfer of voltage that stabilizes power output and eliminates hesitation across the entire RPM range. \u003cem\u003eNote: Always ensure you are replacing round-style coils (not square) prior to installation.\u003c\/em\u003e\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;\"\u003e2008-2010 Hummer H2, H3, H3T (V8 Models)\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;\"\u003e6.2L L92 \/ 5.3L LH8 V8 \/ GMT820 \/ 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;\"\u003e300-393 hp \/ 320-415 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;\"\u003eUF414, D514A, 748UU, 41962\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCadillac Escalade (V8 with Round Coils)\u003c\/li\u003e\n  \u003cli\u003eChevrolet Avalanche (V8 with Round Coils)\u003c\/li\u003e\n  \u003cli\u003eChevrolet Express (V8 with Round Coils)\u003c\/li\u003e\n  \u003cli\u003eChevrolet Silverado (V8 with Round Coils)\u003c\/li\u003e\n  \u003cli\u003eChevrolet Suburban (V8 with Round Coils)\u003c\/li\u003e\n  \u003cli\u003eChevrolet Tahoe (V8 with Round Coils)\u003c\/li\u003e\n  \u003cli\u003eChevrolet Trailblazer (V8 with Round Coils)\u003c\/li\u003e\n  \u003cli\u003eGMC Savana (V8 with Round Coils)\u003c\/li\u003e\n  \u003cli\u003eGMC Yukon (V8 with Round Coils)\u003c\/li\u003e\n  \u003cli\u003eHummer H2 (2008-2009 V8 with Round Coils)\u003c\/li\u003e\n  \u003cli\u003eHummer H3 \/ H3T (2008-2010 V8 with Round Coils)\u003c\/li\u003e\n  \u003cli\u003eInterchanges with OE Parts: C1512, D514A, UF414, 5C1555, E894, 52-1820, IC534, 12573190, 12570616, 12611424, 1788407, GN10165\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe Hummer Off-Road Caliber\u003c\/h3\u003e\n\u003cp\u003eDesigned to withstand the harsh vibrations and extreme conditions of off-road operation, this ignition coil kit ensures robust 4x4 reliability, delivering a consistently clean burn to eliminate annoying CELs and keep your Hummer performing at its peak on any terrain.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":49711135654136,"sku":"DS-EUSYW24JG","price":179.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-spark-plug-for-hummer-h2-h3-h3t-2008-2010-v8-round-style-1.jpg?v=1782796692","url":"https:\/\/performancechiptuning.com\/fr\/products\/ignition-coil-spark-plug-for-hummer-h2-h3-h3t-2008-2010-v8-round-style","provider":"Performance Chip Tuning","version":"1.0","type":"link"}