Upgrade your XRS Cross Bars with additional 4-CORE Side Rails that connect the uprights on both sides of your truck bed. The Side Rail Accessory Kit provides additional mounting tracks for a variety of gear and accessories. XRS Cross Bars come with a Limited Lifetime warranty on materials and construction and a 5 year warranty on the Textured Black Finish.

4-CORE is an extruded track system that works with any 1/4x20 hex bolt or Quick release clamps; Accessory 4-CORE aluminum rails that bridge the uprights of the XRS Bed Cross Rail Kits; Easy bolt-on installation with mounting hardware included; Rails can be cut down to desired length; Sold in pairs - each rail is 37 3/4 inches in length (also available in 49 3/4 inches); Limited Lifetime warranty on materials and construction and a 5 year warranty on the Textured Black Finish.; Works with XRS Bed Cross Rail Kits (5935000T, 5935001T)