{"product_id":"rock-krawler-4-5-inch-x-factor-mid-arm-system-jeep-wrangler-jku-4-door","title":"Rock Krawler 4.5 Inch X Factor Mid-Arm System - Jeep Wrangler JKU 4-Door","description":"\u003cp\u003eThe 4.5 inch X Factor is the mid-arm kit for the Jeep Wrangler JKU 4-Door when you want more articulation than the Adventure-X can give. Adjustable upper and lower control arms offer 95 degrees of total misalignment when paired with Pro-X Krawler joints at the axle and Adventure Series joints at the frame. It is a complete bolt-in system that cuts the bind of the factory arms and still lets you tune caster and pinion angle.\u003c\/p\u003e\u003cp\u003eRock Krawler bases its lift heights on Rubicon models in a standard build, meaning a front bumper and winch, a rear bumper and a full-size spare.\u003c\/p\u003e\u003ch3\u003eWhat's in the kit\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e4 x triple-rate coil springs\u003c\/li\u003e\n\u003cli\u003e2 x front high clearance adjustable lower control arms\u003c\/li\u003e\n\u003cli\u003e2 x front adjustable upper control arms\u003c\/li\u003e\n\u003cli\u003e1 x Pro-X top mount drag link\u003c\/li\u003e\n\u003cli\u003e1 x adjustable front track bar\u003c\/li\u003e\n\u003cli\u003e2 x quick disconnect front sway bar links\u003c\/li\u003e\n\u003cli\u003e2 x rear high clearance adjustable lower control arms\u003c\/li\u003e\n\u003cli\u003e2 x rear adjustable upper control arms\u003c\/li\u003e\n\u003cli\u003e2 x rear spring pads\u003c\/li\u003e\n\u003cli\u003e2 x adjustable rear sway bar links\u003c\/li\u003e\n\u003cli\u003e1 x bolt-on rear track bar relocation bracket\u003c\/li\u003e\n\u003cli\u003e1 x rear track bar\u003c\/li\u003e\n\u003cli\u003e1 x front and rear extended brake line kit\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eBump stops come with every shock package. On the base system they are not included, but they can be bought separately (RK07123).\u003c\/p\u003e\u003ch3\u003eWhy this system\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eAdjustable upper and lower control arms front and rear, with 95 degrees of total misalignment\u003c\/li\u003e\n\u003cli\u003eAdventure Series joints at the frame end are maintenance free, and Pro Krawler joints tie in at the axle\u003c\/li\u003e\n\u003cli\u003eEnough adjustment to tune caster and pinion angle front and rear\u003c\/li\u003e\n\u003cli\u003eTriple-rate coils tuned for comfort on the road with a free length set for off-road articulation\u003c\/li\u003e\n\u003cli\u003eCorrection pads reduce spring bow, and front and rear track bar geometry corrections let you center the axles\u003c\/li\u003e\n\u003cli\u003eCan be upgraded to a Rock Krawler long-arm system later\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003ePick your package\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBase System (No Shocks)\u003c\/strong\u003e: the full kit with no shocks, for builds where you already have shocks picked out.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage 1 (RRD 2.25 Inch IFP Shocks)\u003c\/strong\u003e: Rock Krawler's in-house shock with a 2.25 inch O.D. hard anodized fluted aluminum body, a 3\/4 inch 17-4 PH stainless steel hard chrome plated shaft, a billet aluminum valve circuit, dual DU shaft bearings and double redundant sealing. It is serviceable, rebuildable and revalveable.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eRock Krawler's generic shock lengths for this system are front 18.5 inch collapsed and 29 inch maximum extended and rear 17.3 inch collapsed and 28.31 inch maximum extended, which is handy if you plan to shop for your own shocks.\u003c\/p\u003e\u003ch3\u003eFitment and what else you'll need\u003c\/h3\u003e\u003cp\u003eFits 2007-2018 Jeep Wrangler JKU 4-Door models. Rock Krawler lists it for Sport, Sahara, Willys and Rubicon trim levels.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eIf building with a spare delete we recommend dropping 1 inch in coil lift height for the rear.\u003c\/li\u003e\n\u003cli\u003eIf building an overland or heavily up-fitted build in the back, we recommend upsizing 1 inch in coil lift height for the rear.\u003c\/li\u003e\n\u003cli\u003eWe recommend a new front driveshaft if you plan to off-road routinely. (Adam's Driveshafts, Tom Woods, J.E. Reel)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eTire guidance from Rock Krawler: 33 or 35 inch tall tires with full OEM fenders, 37 inch tall tires with flat fenders. They typically recommend 4.5 inch of backspacing with 33 and 35 inch tires and 3.5 inch with 37 inch tires.\u003c\/p\u003e\u003cp\u003eRock Krawler backs this system with lifetime warranty coverage.\u003c\/p\u003e","brand":"Rock Krawler","offers":[{"title":"Base System (No Shocks)","offer_id":45517454409794,"sku":"JK45XF-4","price":3675.99,"currency_code":"USD","in_stock":true},{"title":"Stage 1 (RRD 2.25 Inch IFP Shocks)","offer_id":45517454442562,"sku":"JK45XF-4S1","price":4929.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1476\/5984\/files\/JK45XF-2S1.THUMB__60873.1750255126.webp?v=1791653740","url":"https:\/\/www.skinnypedalracing.com\/products\/rock-krawler-4-5-inch-x-factor-mid-arm-system-jeep-wrangler-jku-4-door","provider":"Skinny Pedal Racing","version":"1.0","type":"link"}