The Lonestar Racing STS HD A-Arm Kit is a heavy duty, hi-clearance, replacement for the stock XRS width a-arms. Made from heavy duty 4130 chromoly with heat treated uniball pins and 7/8" uniballs on the uppers and 7/8" heim joints on the lowers. Comes with front sway bar links. Will work on the XDS model but requires XRS length shocks.