{"product_id":"ignition-coil-and-iridium-spark-plugs-for-jaguar-xkr-2003-2009-4-2l","title":"Ignition Coil and Iridium Spark Plugs for Jaguar XKR (2003-2009) 4.2L","description":"\u003ch2\u003eDirect-Replacement Ignition Coil and Iridium Spark Plug Kit for 2003-2009 Jaguar XKR\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003ePrimary Function:\u003c\/strong\u003e Restores factory secondary ignition performance and eliminates high-load misfires on the supercharged 4.2L AJ-V8 platform.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock XKR Ignition Degradation\u003c\/h3\u003e\n\u003cp\u003eUnder the thermal strain of the Eaton M112\/Roots-type supercharger and tight engine bay packaging in the X100 and X150 chassis, factory coil packs suffer severe dielectric breakdown. Over time, heat cycles degrade the internal epoxy insulation and primary\/secondary copper windings, causing spark blow-out, erratic cold starts, reduced fuel economy, and P0300-series cylinder misfire fault codes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive ignition service kit features eight direct-fit coil-on-plug assemblies engineered with high-grade internal copper windings and robust thermal-resistant boots to prevent voltage arcing. Paired with eight fine-wire iridium spark plugs, the kit delivers a concentrated spark kernel, superior resistance to carbon fouling, and stable combustion under sustained boost pressures up to redline.\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;\"\u003e2003-2009 Jaguar XKR 4.2L V8\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;\"\u003eAJ34S Supercharged 4.2L \/ X100 \u0026amp; X150\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;\"\u003e390-420 hp \/ 399-413 lb-ft (Approx)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003ePart Number \/ Interchange\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eUF519, UF533, 6R8312A366AA, C1678, LR016999, AJ83415, 5C1735\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2003-2006 Jaguar XKR Base\/Convertible 4.2L Supercharged V8 (X100)\u003c\/li\u003e\n  \u003cli\u003e2007-2009 Jaguar XKR Base\/Convertible\/Portfolio 4.2L Supercharged V8 (X150)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe Jaguar Precision Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered to exact OEM resistance specifications, this direct-replacement ignition kit ensures factory ECU synchronization, smooth idle stabilization, and clean CEL-free operation under aggressive grand touring conditions.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50448293462264,"sku":"DS-EWBEE71JP","price":124.95,"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-jaguar-xkr-2003-2009-4-2l-1.jpg?v=1788638623","url":"https:\/\/performancechiptuning.com\/es\/products\/ignition-coil-and-iridium-spark-plugs-for-jaguar-xkr-2003-2009-4-2l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}