{"product_id":"ignition-coil-iridium-spark-plugs-for-mercedes-benz-slr-mclaren-2005-2009-5-5l","title":"Ignition Coil + Iridium Spark Plugs for Mercedes Benz SLR McLaren (2005-2009) 5.5L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Output Ignition Coil and Iridium Spark Plug Service Kit for 2005-2009 Mercedes Benz SLR McLaren (C199)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The complete ignition kit replaces degrading factory dual-output coils and twin-spark plugs on the 2005-2009 SLR McLaren to eliminate high-boost spark blowout and restore factory combustion efficiency across the supercharged V8 powerband.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Mercedes Benz SLR McLaren Secondary Ignition Breakdown\u003c\/h3\u003e\n\u003cp\u003eThe hand-assembled \u003cstrong\u003eM155\u003c\/strong\u003e supercharged 5.4-liter engine relies on a dual-spark architecture utilizing eight dual-tower ignition coils firing sixteen plugs. Under elevated boost pressure and significant underhood thermal loading inherent to the front-mid mounted \u003cstrong\u003eC199\u003c\/strong\u003e chassis, OEM coil potting compounds suffer dielectric breakdown. Micro-cracking in the primary and secondary coil windings induces intermittent misfires, elevated secondary resistance, and erratic flame propagation under wide-open throttle. Concurrently, factory standard electrodes erode under sustained supercharged cylinder pressures, widening spark gaps, over-saturating the primary drivers, and causing unburned fuel to wash cylinder walls.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive ignition service kit supplies eight direct-fit dual-terminal ignition coils paired with sixteen pre-gapped Denso Iridium TT spark plugs (\u003cstrong\u003eIKH20TT \/ 4704\u003c\/strong\u003e). Each ignition coil features high-dielectric epoxy potting and reinforced PBT housings engineered to withstand excessive radiant engine bay heat soak while maintaining continuous high-energy dwell under peak load. The included iridium-rhodium twin-tip plugs feature an ultra-fine 0.4mm center electrode and a 0.7mm platinum ground needle. This geometry reduces the necessary ionization voltage, eliminates high-cylinder-pressure spark blowout, and stabilizes idle and throttle tip-in without stressing the factory Bosch ME engine management system.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n  \u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; min-width: 300px;\"\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e2005-2009 Mercedes Benz SLR McLaren\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eM155 5.4L Supercharged \/ C199\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e617 hp \/ 575 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eUF359, GN10361, C671, C1361, B253, 5C1226, 5098138AA, 4704\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2005 Mercedes-Benz SLR McLaren Coupe 5.5L Supercharged V8 (M155)\u003c\/li\u003e\n  \u003cli\u003e2006 Mercedes-Benz SLR McLaren Coupe 5.5L Supercharged V8 (M155)\u003c\/li\u003e\n  \u003cli\u003e2007 Mercedes-Benz SLR McLaren 722 Edition \/ Coupe 5.5L Supercharged V8 (M155)\u003c\/li\u003e\n  \u003cli\u003e2007 Mercedes-Benz SLR McLaren Roadster 5.5L Supercharged V8 (M155)\u003c\/li\u003e\n  \u003cli\u003e2008 Mercedes-Benz SLR McLaren Roadster 5.5L Supercharged V8 (M155)\u003c\/li\u003e\n  \u003cli\u003e2009 Mercedes-Benz SLR McLaren Roadster 722 S 5.5L Supercharged V8 (M155)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the C199 SLR McLaren?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2005-2009 Mercedes Benz SLR McLaren equipped with the \u003cstrong\u003eM155\u003c\/strong\u003e twin-spark supercharged V8 engine.\u003c\/p\u003e\n\n\u003ch4\u003eAre plug wires included with this coil and spark plug kit?\u003c\/h4\u003e\n\u003cp\u003eNo, this service kit includes eight dual-output ignition coils and sixteen iridium spark plugs; factory spark plug wires must be inspected and reused or purchased separately.\u003c\/p\u003e\n\n\u003ch3\u003eThe Mercedes Benz Precision Caliber\u003c\/h3\u003e\n\u003cp\u003eSupercharged European powertrains require uncompromising ignition precision; installing factory-matched impedance coils alongside high-efficiency iridium plugs ensures zero misfire fault codes, clean lambda feedback, and instantaneous boost recovery.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67524634476792,"sku":"DS-E0EOYIW0Z","price":433.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-iridium-spark-plugs-for-mercedes-benz-slr-mclaren-2005-2009-5-5l-1.jpg?v=1790460819","url":"https:\/\/performancechiptuning.com\/es\/products\/ignition-coil-iridium-spark-plugs-for-mercedes-benz-slr-mclaren-2005-2009-5-5l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}