{"product_id":"ignition-coil-iridium-spark-plugs-for-hummer-h3-h3t-2007-2010-3-7l-i5","title":"Ignition Coil \u0026 Iridium Spark Plugs for Hummer H3 H3T (2007-2010) 3.7L I5","description":"\u003ch2\u003eReliable Ignition Coils \u0026amp; Iridium Spark Plugs for 2007-2010 Hummer H3 (LLR\/GMT345)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e This complete 5-pack of ignition coils and iridium spark plugs replaces degraded OEM ignition components to restore optimal spark timing, combat misfires, and stabilize the 3.7L engine idle.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock GMT345 Ignition Weakness\u003c\/h3\u003e\n\u003cp\u003eThe factory ignition system on the 3.7L Atlas LLR engine is highly susceptible to thermal degradation. Enduring relentless heat soak during low-speed off-roading or heavy towing cycles, the OEM epoxy potting compound breaks down over time, causing micro-cracking in the coil housing. This compromised insulation creates parasitic voltage loss, resulting in P0300 random misfires, a stumbling idle, and dropped low-end torque. Furthermore, as factory spark plug electrodes erode, the widening gap forces the coils to work harder, severely accelerating ignition component failure.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eUpgrading to this direct-replacement Aero ignition suite completely resolves these high-resistance firing issues. The upgraded ignition coils feature high-dielectric epoxy and reinforced polymer housings designed to withstand extreme under-hood temperatures without warping. Optimized internal copper windings are calibrated to deliver a hotter, faster spark, reducing combustion quenching and maximizing fuel burn. Paired with the included ultra-fine iridium spark plugs, the system requires less firing voltage to maintain a stable arc. The iridium center electrodes provide exceptional resistance to electrical wear, ensuring thousands of miles of consistent delivery. This translates to restored torque, immediate throttle response, and a stabilized idle.\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 Atlas LLR I5 \/ 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;\"\u003eIC78051257057810010305\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 3.7L I5\u003c\/li\u003e\n  \u003cli\u003e2008 Hummer H3 3.7L I5\u003c\/li\u003e\n  \u003cli\u003e2009 Hummer H3 3.7L I5\u003c\/li\u003e\n  \u003cli\u003e2010 Hummer H3 3.7L I5\u003c\/li\u003e\n  \u003cli\u003e2009 Hummer H3T 3.7L I5\u003c\/li\u003e\n  \u003cli\u003e2010 Hummer H3T 3.7L I5\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe Hummer Off-Road Standard\u003c\/h3\u003e\n\u003cp\u003eFor a rugged platform like the H3, a flawless ignition sequence is critical for off-road reliability and towing stability. This kit ensures your rig has the dependable spark needed to power through harsh environments without leaving you stranded on the trail.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":48266172694776,"sku":"DS-EEY4BYQHA","price":169.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-iridium-spark-plugs-for-hummer-h3-h3t-2007-2010-3-7l-i5-1.jpg?v=1776806946","url":"https:\/\/performancechiptuning.com\/fr\/products\/ignition-coil-iridium-spark-plugs-for-hummer-h3-h3t-2007-2010-3-7l-i5","provider":"Performance Chip Tuning","version":"1.0","type":"link"}