This is an optional RPM Slash LCG 4x4 & Rally Nerf Bar Set. The chassis layouts of the 1/10th scale Rally LCG & Slash 4x4 LCG changed the original design of the stock nerf bars, making the RPM80622 & RPM80625 nerf bars unusable. These LCG nerf bars fix that problem and are a direct, perfect fit! RPM LCG Nerf Bars have added structural support to help strengthen the body and reduce impact forces transferred to Black Nerf Bars for the 1/10th Rally, LCG Slash 2wd & LCG Slash 4x4. The additional cross bracing optimizes the rigidity while absorbing additional impact energy anything less than RPM would have crumpled under! RPM Nerf Bars are stock replacement parts and work with all stock Traxxas chassis nerf bars TRA7423. RPM Nerf Bars are proudly made in the USA, molded in either blue or black from our engineering grade nylons and backed by our limited lifetime warranty against breakage. Features: Available in Black and Blue