{"product_id":"upgraded-billet-2-piece-idler-kit-for-jaguar-f-type-xf-xj-xkr-2010-2024-3-0l-5-0l","title":"Upgraded Billet 2 Piece Idler Kit for Jaguar F-Type XF XJ XKR (2010-2024) 3.0L 5.0L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHeavy-Duty Upgraded Billet 2-Piece Idler Kit for 2010-2024 Jaguar F-Type, XF, XJ, XKR (X152, X250, X260, X351, X150)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Upgraded Billet 2-Piece Supercharger Idler Kit replaces failure-prone factory composite pulleys on 2010-2024 Jaguar F-Type, XF, XJ, and XKR models to prevent belt slip, bearing seizure, and catastrophic drive belt failure under boost.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Jaguar AJ126 \u0026amp; AJ133 Belt Drive Failure Points\u003c\/h3\u003e\n\u003cp\u003eFactory supercharged Jaguar platforms utilize nylon-reinforced polymer idler and tensioner pulleys on the secondary 8-rib supercharger drive circuit. Operating in close proximity to the Eaton TVS supercharger assembly, these plastic pulleys endure brutal thermal cycling and rotational speeds exceeding 15,000 RPM. Over time, heat soak degrades the composite material, leading to groove deformation, high-frequency rib deflection, and microscopic edge chipping. More critically, the economy-grade factory open-race bearings bleed out grease under persistent lateral belt loads, resulting in dry bearing friction, chirping, unguided axial play, and total pulley disintegration that throws the drive belt and leaves the vehicle stranded.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered to resolve stock OEM vulnerabilities, this 2-piece upgrade kit is precision CNC-machined from solid 6061-T6 aircraft-grade billet aluminum. Each pulley features exact-tolerance 8-rib profiles to maintain optimal serpentine belt alignment without parasitic drag or rib jump. Finished in a MIL-A-8625 Type III hard-anodized protective coating, the pulley faces resist surface galling and abrasive road debris. Rotational duties are handled by premium \u003cstrong\u003eNachi\u003c\/strong\u003e precision bearings engineered for high-RPM continuous duty, fortified with dual-contact contact rubber seals to prevent contamination from engine bay grit and volatile fluids while permanently retaining high-temp synthetic lubricant.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2 x CNC Billet Aluminum Hard-Anodized Idler \/ Tensioner Pulleys with Pre-Installed Nachi Bearings\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n  \u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; min-width: 300px;\"\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;\"\u003e2010-2024 Jaguar F-Type, XF, XJ, XKR\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;\"\u003eAJ126 (3.0L S\/C), AJ133 (5.0L S\/C) \/ X152, X250, X260, X351, X150\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;\"\u003e340-575 hp \/ 332-516 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;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2010-2024 Jaguar F-Type 3.0L V6 Supercharged\u003c\/li\u003e\n  \u003cli\u003e2010-2024 Jaguar F-Type 5.0L V8 Supercharged\u003c\/li\u003e\n  \u003cli\u003e2010-2024 Jaguar XF 3.0L V6 Supercharged\u003c\/li\u003e\n  \u003cli\u003e2010-2024 Jaguar XF 5.0L V8 Supercharged\u003c\/li\u003e\n  \u003cli\u003e2010-2024 Jaguar XJ 3.0L V6 Supercharged\u003c\/li\u003e\n  \u003cli\u003e2010-2024 Jaguar XJ 5.0L V8 Supercharged\u003c\/li\u003e\n  \u003cli\u003e2010-2024 Jaguar XKR 5.0L V8 Supercharged\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the X152, X250, X260, X351, or X150 F-Type, XF, XJ, XKR?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for 2010-2024 Jaguar models equipped with supercharged \u003cstrong\u003eAJ126\u003c\/strong\u003e 3.0L V6 and \u003cstrong\u003eAJ133\u003c\/strong\u003e 5.0L V8 engines; naturally aspirated engine variants are strictly excluded.\u003c\/p\u003e\n\n\u003ch4\u003eDoes this kit include the complete tensioner cast arm assembly?\u003c\/h4\u003e\n\u003cp\u003eNo, this kit includes only the CNC billet replacement pulleys with integrated high-grade bearings and does not include the spring-loaded tensioner casting.\u003c\/p\u003e\n\n\u003ch3\u003eThe Jaguar Precision Standard\u003c\/h3\u003e\n\u003cp\u003eHigh-output European supercharger assemblies demand zero belt runout to eliminate knock-inducing harmonics and maintain pinpoint boost consistency. CNC-machined to exact tolerances, these billet idler pulleys retain factory drive geometry, guaranteeing smooth operation with zero check engine lights.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67558847185144,"sku":"DS-EFG111A18","price":249.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/upgraded-billet-2-piece-idler-kit-for-jaguar-f-type-xf-xj-xkr-2010-2024-3-0l-5-0l-1.jpg?v=1790925410","url":"https:\/\/performancechiptuning.com\/fr\/products\/upgraded-billet-2-piece-idler-kit-for-jaguar-f-type-xf-xj-xkr-2010-2024-3-0l-5-0l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}