{"product_id":"ignition-coil-and-iridium-spark-plugs-for-jaguar-xk-2007-2009-4-2l","title":"Ignition Coil and Iridium Spark Plugs for Jaguar XK (2007-2009) 4.2L","description":"\u003ch2\u003eDirect-Replacement Ignition Coil and Iridium Spark Plug Kit for 2007-2009 Jaguar XK\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e Restores factory secondary ignition output and precise combustion timing across all eight cylinders to eliminate engine misfires, erratic idle, and unburned fuel delivery.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock XK Ignition Degradation\u003c\/h3\u003e\n\u003cp\u003eDue to the compact packaging of the Jaguar X150 engine bay, factory ignition coils endure severe thermal cycling that degrades the internal secondary insulation and epoxy potting over time. As internal resistance builds across aging OEM copper windings, spark voltage drops significantly under load, causing electrode gap bridge failure, hesitations, and micro-arcing. Simultaneously, worn standard spark plugs increase electrical load on the ECU coil drivers, triggering catalytic-damaging misfires.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive 8-cylinder service kit pairs heavy-duty coil-on-plug assemblies with fine-wire iridium spark plugs. The ignition coils feature high-conductivity copper windings, reinforced dielectric housings, and factory-matched direct-fit blade terminals that resist thermal breakdown. Coupled with high-melting-point iridium core electrodes that demand lower firing voltages and yield a more consistent flame kernel, this kit delivers stable combustion dynamics and long-term dielectric reliability.\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;\"\u003e2007-2009 Jaguar XK\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;\"\u003e4.2L AJ-V8 (AJ34) \/ 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;\"\u003e300 hp \/ 310 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;\"\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\u003e2007 Jaguar XK Base 4.2L V8 (Coupe \/ Convertible)\u003c\/li\u003e\n  \u003cli\u003e2008 Jaguar XK Base 4.2L V8 (Coupe \/ Convertible)\u003c\/li\u003e\n  \u003cli\u003e2009 Jaguar XK Base 4.2L V8 (Coupe \/ Convertible)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe Jaguar Precision Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered to meet the tight tolerances of high-performance European luxury grand tourers, this ignition set ensures zero diagnostic trouble codes (CEL-free operation), seamless ECM communication, and rapid cold-start firing.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50448294248696,"sku":"DS-EG52PQS3V","price":120.95,"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-xk-2007-2009-4-2l-1.jpg?v=1788638777","url":"https:\/\/performancechiptuning.com\/products\/ignition-coil-and-iridium-spark-plugs-for-jaguar-xk-2007-2009-4-2l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}