The RPM Rear Skid Plate for the ECX Circuit 4×4 and Torment 4×4 adds protection to the chassis where the stock version does not. RPM lowered the skid plate by .078” (2mm) below the base level of the chassis to help reduce the amount of skid damage the chassis plate encounters at the rear end, where the most amount of wear is usually encountered. Each RPM Rear Skid Plate is molded from an ultra-durable blend of engineering grade nylons.