{"product_id":"ignition-coil-and-iridium-spark-plugs-for-infiniti-q45-1997-2001-4-1l","title":"Ignition Coil and Iridium Spark Plugs for Infiniti Q45 (1997-2001) 4.1L","description":"\u003ch2\u003eDirect-Fit Ignition Coil and Iridium Spark Plug Kit for 1997-2001 Infiniti Q45\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The ignition coil and iridium spark plug kit replaces aged factory coil packs and degraded plugs on the 1997-2001 Infiniti Q45 to restore peak spark energy, stabilize idle, and eliminate cylinder misfires.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Infiniti Q45 Thermal Degradation Weakness\u003c\/h3\u003e\n\u003cp\u003eThe factory ignition setup on the \u003cstrong\u003eFY33\u003c\/strong\u003e chassis suffers from severe thermal fatigue due to tightly packed engine bay packaging and prolonged heat-soak around the cylinder heads. Over time, the internal primary and secondary copper windings inside the OEM coil packs break down, causing high-voltage dielectric breakdown and intermittent spark blowout under load. Concurrently, factory standard-metal spark plugs erode at the ground electrode, expanding the plug gap and forcing degraded coils to draw excessive primary current, which ultimately triggers downstream ignition misfires and unburnt hydrocarbon catalyst contamination.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive service kit replaces all eight positions with high-dielectric epoxy-molded pencil ignition coils and fine-wire iridium spark plugs matched for the \u003cstrong\u003eVH41DE\u003c\/strong\u003e architecture. Each coil housing features reinforced thermoplastic PBT construction to resist thermal cycling, along with internal magnetic core laminations wound to match factory dwell times while delivering consistent secondary output above 30kV. Paired with laser-welded 0.6mm iridium center-electrode spark plugs, this kit provides superior spark kernel propagation, lower required firing voltages, and exceptional resistance to carbon fouling under cold-start conditions.\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;\"\u003e1997-2001 Infiniti Q45\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;\"\u003e\n\u003cstrong\u003eVH41DE\u003c\/strong\u003e \/ \u003cstrong\u003eFY33\u003c\/strong\u003e\n\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;\"\u003e266 hp \/ 278 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;\"\u003e\n\u003cstrong\u003e22448H3000\u003c\/strong\u003e, \u003cstrong\u003eUF282\u003c\/strong\u003e, KIN133695TOP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1997 Infiniti Q45 Base \/ Touring 4.1L V8\u003c\/li\u003e\n  \u003cli\u003e1998 Infiniti Q45 Base \/ Touring 4.1L V8\u003c\/li\u003e\n  \u003cli\u003e1999 Infiniti Q45 Base \/ Touring 4.1L V8\u003c\/li\u003e\n  \u003cli\u003e2000 Infiniti Q45 Base \/ Touring \/ Anniversary Edition 4.1L V8\u003c\/li\u003e\n  \u003cli\u003e2001 Infiniti Q45 Base \/ Touring 4.1L V8\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the FY33 Q45?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 1997-2001 Infiniti Q45 equipped with the \u003cstrong\u003eVH41DE\u003c\/strong\u003e engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre these spark plugs pre-gapped for the VH41DE?\u003c\/strong\u003e\u003cbr\u003e Yes, the iridium plugs arrive pre-gapped to factory specifications, though verifying clearance before installation is always recommended.\u003c\/p\u003e\n\n\u003ch3\u003eThe Infiniti VIP Caliber\u003c\/h3\u003e\n\u003cp\u003eDesigned to maintain the legendary smoothness and linear power delivery of classic JDM luxury platforms, this ignition assembly restores crisp throttle response and clean combustion without altering factory ECU calibrations.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50594764423416,"sku":"DS-E3BSMXLYX","price":139.95,"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-infiniti-q45-1997-2001-4-1l-1.jpg?v=1790059404","url":"https:\/\/performancechiptuning.com\/products\/ignition-coil-and-iridium-spark-plugs-for-infiniti-q45-1997-2001-4-1l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}