{"product_id":"clayton-off-road-unibody-frame-rails-jeep-wj-cor-2206210","title":"Clayton Off Road Unibody Frame Rails for 1999-2004 Jeep Grand Cherokee WJ","description":"\u003ch3\u003eIs This for You?\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eYou're building a long-arm suspension system on your WJ and need structural rails that tie the front 3-piece crossmember to the rear long-arm frame brackets into a unified chassis foundation.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eYou understand the WJ is a unibody platform and you're adding weld-in subframe rails underneath to handle the increased load of a long-arm 4-link conversion.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eYou're a fabricator comfortable with MIG\/TIG welding on unibody chassis and want laser-cut, bare-metal components ready for your own finish.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Result\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eLaser-cut and bent from 3\/16\" steel — significantly heavier than the factory unibody floor structure — to handle long-arm suspension loads without flex or fatigue.\u003c\/li\u003e\n\u003cli\u003eBridges the Clayton Off Road front 3-piece crossmember and rear long-arm frame brackets, creating a continuous load path under the unibody floor.\u003c\/li\u003e\n\u003cli\u003eSold as a pair (driver + passenger), shipped bare metal, weld-in installation required.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThe WJ Grand Cherokee uses a unibody construction — there is no traditional frame rail running front to rear. When you install a long-arm suspension system, the increased leverage and articulation forces need a structural path to transfer loads between the front crossmember and rear bracket mounting points. These Clayton Off Road unibody frame rails weld directly under the floor pan to create that connection. Laser-cut from 3\/16\" steel plate and CNC-bent for precise fitment, they are not frame stiffeners — they are structural subframe rails that weld UNDER the unibody to span between the front 3-piece crossmember and the rear long-arm frame brackets. Do not confuse these with bolt-on or adhesive unibody stiffeners. Welding is required, and these are raw fabrication components shipped bare metal for your own primer and finish.\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e3\/16\" laser-cut steel plate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eBare metal (uncoated)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSold As\u003c\/td\u003e\n\u003ctd\u003ePair (driver + passenger)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eWeld-in under unibody (welding required)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Front\u003c\/td\u003e\n\u003ctd\u003eClayton Off Road 3-piece front crossmember\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Rear\u003c\/td\u003e\n\u003ctd\u003eClayton Off Road WJ long-arm rear frame brackets\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Length\u003c\/td\u003e\n\u003ctd\u003e32 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Width\u003c\/td\u003e\n\u003ctd\u003e4 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Height\u003c\/td\u003e\n\u003ctd\u003e4 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Weight\u003c\/td\u003e\n\u003ctd\u003e24 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003eCOR-2206210\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eVerified Fitment (OFAS Standard)\u003c\/h3\u003e\u003cp\u003e✅ \u003cstrong\u003eFits:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e1999–2004 Jeep Grand Cherokee Laredo (WJ)\u003c\/li\u003e\n\u003cli\u003e1999–2004 Jeep Grand Cherokee Limited (WJ)\u003c\/li\u003e\n\u003cli\u003e2002 Jeep Grand Cherokee Sport (WJ)\u003c\/li\u003e\n\u003cli\u003e2002–2004 Jeep Grand Cherokee Overland (WJ)\u003c\/li\u003e\n\u003cli\u003e2004 Jeep Grand Cherokee Special Edition (WJ)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e❌ \u003cstrong\u003eDoes NOT Fit:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e1993–1998 Jeep Grand Cherokee ZJ — different unibody dimensions and crossmember system\u003c\/li\u003e\n\u003cli\u003e2005–2010 Jeep Grand Cherokee WK — incompatible platform\u003c\/li\u003e\n\u003cli\u003e2011–2026 Jeep Grand Cherokee WK2 \/ WL — incompatible platform\u003c\/li\u003e\n\u003cli\u003eAny application not using the Clayton Off Road WJ long-arm front crossmember and rear bracket system\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eInstallation \u0026amp; Fabrication Notes\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e⚠️ These are NOT unibody frame stiffeners. They weld UNDER the unibody floor to connect the Clayton Off Road front 3-piece crossmember to the rear long-arm frame brackets.\u003c\/li\u003e\n\u003cli\u003eWelding is required. MIG or TIG with ER70S-6 filler recommended.\u003c\/li\u003e\n\u003cli\u003eClean, degrease, and remove any undercoating or seam sealer from all weld contact surfaces before fitment.\u003c\/li\u003e\n\u003cli\u003eDry-fit and verify rail alignment with both the front crossmember and rear brackets before tacking.\u003c\/li\u003e\n\u003cli\u003eTack weld, verify geometry, then run final weld passes.\u003c\/li\u003e\n\u003cli\u003eApply primer and chassis paint or powder coat immediately after welding to protect bare metal.\u003c\/li\u003e\n\u003cli\u003eAfter installation, perform a full alignment check and set pinion angle per your lift height and driveline spec.\u003c\/li\u003e\n\u003cli\u003e⚠️ CALIFORNIA WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWheel \u0026amp; Tire Fitment\u003c\/h3\u003e\u003cp\u003eThese are structural chassis components and do not directly dictate wheel or tire sizing. Consult your Clayton Off Road WJ long-arm kit documentation for lift height and tire clearance recommendations. Typical WJ long-arm builds run 33\"–35\" tires depending on fender clearance and lift configuration.\u003c\/p\u003e\u003cblockquote\u003e\u003cp\u003e\u003cstrong\u003eEngineering Question:\u003c\/strong\u003e Are you running the complete Clayton Off Road WJ long-arm system including the front 3-piece crossmember and rear frame brackets? These rails are engineered to interface with both endpoints of that system — confirm you have the correct crossmember and bracket part numbers before ordering.\u003c\/p\u003e\u003c\/blockquote\u003e","brand":"Clayton Off Road","offers":[{"title":"Default Title","offer_id":51651323625793,"sku":"COR-2206210","price":169.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0974\/1284\/1793\/files\/COR-2206210-COR.jpg?v=1776528106","url":"https:\/\/obsidianforgedautosupply.com\/products\/clayton-off-road-unibody-frame-rails-jeep-wj-cor-2206210","provider":"Obsidian Forged Auto Supply","version":"1.0","type":"link"}