{"product_id":"jks-jspec158ps","title":"JKS J-Venture 3.5\" Lift Kit w\/ Fox 2.5 | 2020–2024 Jeep Wrangler JL 4-Door EcoDiesel","description":"\u003ch2\u003eJKS J-Venture 3.5\" Lift Kit w\/ Fox 2.5 | 2020–2024 Jeep Wrangler JL 4-Door EcoDiesel\u003c\/h2\u003e\n\n\u003ch3\u003eIs This for You?\u003c\/h3\u003e\n\u003cp\u003eYou're running a JL 4-Door EcoDiesel and you want 3.5\" of lift with Fox 2.5 reservoir damping on the J-Venture short-arm platform — without the complexity of a long-arm conversion. The JSPEC158PS delivers JKS J-Venture geometry-corrected control arms with Fox 2.5 Performance Series reservoir shocks, engineered specifically for the EcoDiesel's heavier front end. The 3.0L V6 diesel adds significant mass over the front axle — this kit's coil rate is calibrated for that weight. No differential drop required.\u003c\/p\u003e\n\n\u003ch3\u003eThe Result\u003c\/h3\u003e\n\u003cp\u003e3.5\" of lift with JKS J-Venture geometry correction calibrated for the EcoDiesel's front-end weight. Fox 2.5 reservoir shocks deliver consistent damping and heat dissipation on extended trail runs under the diesel's heavier front-end load. Adjustable control arms allow precise alignment post-install. The J-Venture's short-arm install simplicity is a meaningful advantage on the EcoDiesel platform, which has additional underbody complexity compared to the gas JL.\u003c\/p\u003e\n\n\u003ch3\u003eVerified Fitment (OFAS Standard)\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e 2020–2024 Jeep Wrangler JL 4-Door (Unlimited) — 3.0L EcoDiesel ONLY\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDoes NOT fit:\u003c\/strong\u003e JL Gas Models (2.0T, 3.6L) | JL 4xe Hybrid | JL 2-Door | 2025–2026 JL (EcoDiesel not offered) | JK (any year)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Note:\u003c\/strong\u003e EcoDiesel was available in the JL 4-Door from 2020–2024 only. Confirm your engine code before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSystem Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eLift Height: 3.5\"\u003c\/li\u003e\n\u003cli\u003eSystem: J-Venture Short-Arm (EcoDiesel-specific coil rate)\u003c\/li\u003e\n\u003cli\u003eShock: Fox 2.5 Performance Series w\/ Reservoir\u003c\/li\u003e\n\u003cli\u003eCoil Rate: Heavy-duty — engineered for EcoDiesel front-end mass\u003c\/li\u003e\n\u003cli\u003eControl Arms: JKS J-Venture geometry-corrected short-arm control arms\u003c\/li\u003e\n\u003cli\u003eSKU: JSPEC158PS\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eInstallation \u0026amp; Fabrication Notes\u003c\/h3\u003e\n\u003cp\u003eShort-arm system does not require differential drop or relocation. Professional 4-wheel alignment required post-installation. Torque all control arm hardware to JKS specification after a 500-mile break-in. Confirm Fox 2.5 reservoir clearance against diesel-specific underbody components and skid plates. No cutting or welding required for standard JL 4-Door EcoDiesel applications.\u003c\/p\u003e\n\n\u003ch3\u003eWheel \u0026amp; Tire Fitment\u003c\/h3\u003e\n\u003cp\u003eEngineered for 35\"–37\" tires. Recommended backspacing: 4.5\"–4.75\" on a 17\"×9\" or 18\"×9\" wheel. The EcoDiesel's heavier front end affects fender clearance differently than the gas JL — confirm tire brand and tread width before finalizing wheel selection.\u003c\/p\u003e\n\n\u003ch3\u003eEngineering Question\u003c\/h3\u003e\n\u003cblockquote\u003e\u003cp\u003eChoosing between the J-Venture short-arm and J-Konnect long-arm at 3.5\" of lift for an EcoDiesel JL 4-Door with Fox 2.5 reservoir shocks — does the EcoDiesel's heavier front end make the long-arm's superior caster correction more valuable on the diesel platform than it would be on a gas JL? Yes — the EcoDiesel's additional front-end mass amplifies the effects of caster error at 3.5\" of lift, which means the J-Konnect's long-arm geometry correction delivers a more noticeable improvement in steering feel and highway stability on the diesel than on the lighter gas JL. If your EcoDiesel sees regular highway miles and trail use, the J-Konnect long-arm is the better long-term platform. Contact OFAS with your build priorities and we'll confirm which system is the right call for your specific EcoDiesel JL 4-Door.\u003c\/p\u003e\u003c\/blockquote\u003e","brand":"JKS Manufacturing","offers":[{"title":"Default Title","offer_id":51444626260289,"sku":"JSPEC158PS","price":1912.16,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0974\/1284\/1793\/files\/JSPEC158PS_0-BKWD.jpg?v=1772725971","url":"https:\/\/obsidianforgedautosupply.com\/products\/jks-jspec158ps","provider":"Obsidian Forged Auto Supply","version":"1.0","type":"link"}