{"product_id":"ignition-coil-and-iridium-spark-plugs-for-jaguar-xjr-1995-1997-4-0l","title":"Ignition Coil and Iridium Spark Plugs for Jaguar XJR (1995-1997) 4.0L","description":"\u003ch2\u003eDirect-Fit Ignition Coil and Iridium Spark Plug Kit for 1995-1997 Jaguar XJR\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The ignition coil and iridium spark plug kit restores factory ignition energy and combustion efficiency on the 1995-1997 Jaguar XJR to eliminate misfires under boost and restore lost throttle response.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Jaguar XJR Secondary Breakdown and Spark Blowout\u003c\/h3\u003e\n\u003cp\u003eThe supercharged inline-six in the \u003cstrong\u003eX300\u003c\/strong\u003e chassis relies on individual coil-on-plug modules subjected to intense cylinder head heat soak. Over thermal cycles, the factory epoxy encapsulation cracks, causing internal dielectric breakdown and secondary voltage leak down to the spark plug well. Under boost from the Eaton M90 supercharger, high cylinder pressures create extreme spark resistance. Weakened factory coils struggle to bridge wide gaps, resulting in spark blowout, stutter under acceleration, and uneven idle across cylinders.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive service pack combines heavy-duty coil packs with fine-wire iridium spark plugs to stabilize primary and secondary ignition circuits. Each coil features high-grade copper windings and thermoset potting compound to resist thermal cracking and dielectric failure. The paired iridium plugs feature ultra-dense, laser-welded fine-wire center electrodes that require less strike voltage while resisting erosion under forced induction. This setup delivers a crisp, consistent kernel to sustain complete combustion across the entire powerband without spark degradation.\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; margin-bottom: 20px;\"\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;\"\u003e1995-1997 Jaguar XJR\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;\"\u003e4.0L Supercharged I6 (AJ16S) \/ X300\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;\"\u003e322 hp \/ 378 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;\"\u003e68080580AB, UF384, 68242286AA, 68242286AB, UF754, KIN119945TOP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1995 Jaguar XJR Base Sedan 4.0L Supercharged Inline-6 (AJ16)\u003c\/li\u003e\n  \u003cli\u003e1996 Jaguar XJR Base Sedan 4.0L Supercharged Inline-6 (AJ16)\u003c\/li\u003e\n  \u003cli\u003e1997 Jaguar XJR Base Sedan 4.0L Supercharged Inline-6 (AJ16)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the X300 XJR?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 1995-1997 Jaguar XJR equipped with the supercharged 4.0L AJ16S engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo the iridium spark plugs require gapping prior to installation?\u003c\/strong\u003e\u003cbr\u003e The plugs arrive pre-gapped to factory forced-induction specifications, but gap verification with a non-contact feeler gauge is recommended before torquing.\u003c\/p\u003e\n\n\u003ch3\u003eThe Jaguar Precision Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered for European forced-induction standards, these components maintain precise dwell-time resistance and factory diagnostic protocol compliance to prevent false misfire codes and check engine lights.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50593981202680,"sku":"DS-EURL1BEV9","price":104.95,"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-xjr-1995-1997-4-0l-1.jpg?v=1790054981","url":"https:\/\/performancechiptuning.com\/products\/ignition-coil-and-iridium-spark-plugs-for-jaguar-xjr-1995-1997-4-0l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}