{"product_id":"jks-jspec128ps","title":"JKS J-Krawl 3.5\" Lift Kit w\/ Fox 2.5 | HD Coils | 2018–2026 Jeep Wrangler JL 4-Door","description":"\u003ch2\u003eJKS J-Krawl 3.5\" Lift Kit w\/ Fox 2.5 | HD Coils | 2018–2026 Jeep Wrangler JL 4-Door\u003c\/h2\u003e\n\n\u003ch3\u003eIs This for You?\u003c\/h3\u003e\n\u003cp\u003eYou're building a dedicated crawler on an accessorized JL 4-Door Unlimited and you want 3.5\" of lift with the J-Krawl system and Fox 2.5 reservoir damping. The JSPEC128PS delivers JKS J-Krawl crawler geometry with Fox 2.5 Performance Series reservoir shocks and HD coil springs. HD coils handle the weight of a steel bumper, winch, and rock rails without sagging, and the J-Krawl's crawler-specific geometry delivers maximum articulation for technical terrain on the JL 4-Door platform.\u003c\/p\u003e\n\n\u003ch3\u003eThe Result\u003c\/h3\u003e\n\u003cp\u003e3.5\" of lift with JKS J-Krawl crawler geometry — engineered for maximum droop travel and articulation on technical terrain. HD coils maintain ride height under accessory loads. Fox 2.5 reservoir shocks deliver consistent damping and heat dissipation on extended trail runs. The JL 4-Door's longer wheelbase provides a stable platform for the J-Krawl's articulation-focused design at 3.5\" of lift.\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 2018–2026 Jeep Wrangler JL 4-Door (Unlimited) — Gas Models (2.0T, 3.6L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDoes NOT fit:\u003c\/strong\u003e JL 2-Door | JL EcoDiesel | JL 4xe Hybrid | JK (any year) | Gladiator JT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoil Note:\u003c\/strong\u003e HD Rate — engineered for accessorized JL 4-Door builds with steel bumpers, winch, or rock rails. Use JSPEC127PS (Std-Rate) for stock-weight builds.\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-Krawl (crawler-specific geometry, maximum articulation)\u003c\/li\u003e\n\u003cli\u003eShock: Fox 2.5 Performance Series w\/ Reservoir\u003c\/li\u003e\n\u003cli\u003eCoil Rate: HD — tuned for accessorized JL 4-Door crawler builds\u003c\/li\u003e\n\u003cli\u003eControl Arms: JKS J-Krawl geometry-corrected control arms\u003c\/li\u003e\n\u003cli\u003eSKU: JSPEC128PS\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eInstallation \u0026amp; Fabrication Notes\u003c\/h3\u003e\n\u003cp\u003eProfessional 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 skid plates and rock rails. The J-Krawl system is designed for locker-equipped builds — confirm front and rear locker compatibility with OFAS before finalizing your build spec. No cutting or welding required for standard JL 4-Door gas applications.\u003c\/p\u003e\n\n\u003ch3\u003eWheel \u0026amp; Tire Fitment\u003c\/h3\u003e\n\u003cp\u003eEngineered for 37\" tires on a dedicated crawler build. Recommended backspacing: 4.5\"–4.75\" on a 17\"×9\" or 18\"×9\" wheel. The JL 4-Door's longer wheelbase provides more fender clearance than the 2-Door at 3.5\" of lift — confirm tire brand and tread width before finalizing wheel selection. Contact OFAS for 40\" tire clearance confirmation.\u003c\/p\u003e\n\n\u003ch3\u003eEngineering Question\u003c\/h3\u003e\n\u003cblockquote\u003e\u003cp\u003eChoosing between the J-Krawl 3.5\" HD on a JL 4-Door versus the J-Krawl 3.5\" HD on a JL 2-Door for a dedicated crawler build with Fox 2.5 reservoir shocks — how does the JL 4-Door's longer wheelbase affect the J-Krawl's articulation performance and the Fox 2.5's shock travel utilization compared to the shorter 2-Door? The JL 4-Door's longer wheelbase produces slower chassis pitch cycles per trail obstacle, which means the Fox 2.5 is working at lower shaft velocities per mile of trail than on the 2-Door. The longer wheelbase also means the 4-Door's articulation arc is different from the 2-Door's — the J-Krawl's geometry correction is calibrated for each platform separately. Contact OFAS with your build spec and primary terrain and we'll confirm the right J-Krawl configuration for your specific JL 4-Door crawler build.\u003c\/p\u003e\u003c\/blockquote\u003e","brand":"JKS Manufacturing","offers":[{"title":"Default Title","offer_id":51444642447681,"sku":"JSPEC128PS","price":3224.87,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0974\/1284\/1793\/files\/JSPEC128PS_0-BKWD.jpg?v=1772726262","url":"https:\/\/obsidianforgedautosupply.com\/products\/jks-jspec128ps","provider":"Obsidian Forged Auto Supply","version":"1.0","type":"link"}