Our kit was designed for high horsepower applications and is the same kit we install on our 10.5" tire cars. 4340 Spherical bearing housings bolt into your chassis after the supplied brackets are welded into place. The cross bars are 28" long with 1.50" OD by .250" wall 4340 chrome-moly so you can cut to your desired length. This kit comes with 4340 chrome-moly arms, links, brackets and QA1 rod ends. It comes with all the grade 8 hardware necessary to assemble the kit. Up to 1500-2000HP! Upgrade to chromoly QA1 Rod Ends available.