{"product_id":"ignition-coil-iridium-spark-plugs-for-jaguar-xkr-2010-2012-5-0l-v8","title":"Ignition Coil \u0026 Iridium Spark Plugs for Jaguar XKR (2010-2012) 5.0L V8","description":"\u003ch2\u003eHigh-Energy Ignition Coil \u0026amp; Iridium Spark Plug Kit for 2010-2012 Jaguar XF\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eDirect-fit replacement ignition coils and iridium spark plugs designed to restore lost spark energy, eliminate misfires, and ensure consistent combustion in the 5.0L V8.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock X250 Ignition Weakness\u003c\/h3\u003e\n\u003cp\u003eThe factory ignition coils on the 5.0L AJ133 V8 are notoriously susceptible to thermal degradation due to their placement directly over the cylinder banks. Over time, the intense heat cycles from the engine block break down the internal epoxy potting and primary copper windings. This thermal stress leads to internal resistance increases, voltage leaks, weak spark delivery, and localized arcing. The result is a cascading effect of engine misfires, rough idle, unburned fuel triggering check engine lights (CEL), and accelerated fouling of the standard spark plugs, especially under heavy throttle loads or forced induction environments.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive ignition kit tackles inherent AJ133 spark degradation by combining OE-plus grade ignition coils with premium iridium spark plugs. The upgraded coils feature heavy-duty copper wire internals and high-dielectric epoxy resin, significantly improving heat dissipation and resisting thermal breakdown in the XF's tight engine bay. This ensures maximum voltage transfer to the spark plug without bleed-off. The included iridium spark plugs boast an ultra-fine center electrode that requires less voltage to bridge the gap, generating a stronger, more concentrated spark kernel. This pairing delivers up to a 15% increase in spark efficiency, optimizing the air-fuel burn rate for smoother idle, restored throttle response, and robust power delivery across the entire RPM range.\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;\"\u003e2010-2012 Jaguar XF \u0026amp; XKR\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;\"\u003eAJ133 5.0L V8 \/ X250\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;\"\u003e385 - 510 hp \/ 380 - 461 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;\"\u003eUF618, LR010687, AJ811378, 8W9312A366DA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2010-2012 Jaguar XF 5.0L V8 (Naturally Aspirated \u0026amp; Supercharged)\u003c\/li\u003e\n  \u003cli\u003e2010-2012 Jaguar XKR 5.0L V8 (Naturally Aspirated \u0026amp; Supercharged)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe Jaguar Caliber\u003c\/h3\u003e\n\u003cp\u003eMaintaining precision engineering requires high-caliber components. This ignition overhaul ensures your X250 operates without rough idles or phantom CELs, delivering the smooth, sophisticated power expected from a British V8.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":49748843757816,"sku":"DS-E1D79HHUE","price":149.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-iridium-spark-plugs-for-jaguar-xkr-2010-2012-5-0l-v8-1.jpg?v=1782926956","url":"https:\/\/performancechiptuning.com\/es\/products\/ignition-coil-iridium-spark-plugs-for-jaguar-xkr-2010-2012-5-0l-v8","provider":"Performance Chip Tuning","version":"1.0","type":"link"}