Hot Racing Rear HD Torsional Sway Bar Set for Traxxas UDR (Red)The Hot Racing Traxxas Unlimited Desert Rear HD Torsional Sway Bar Set is an optional upgrade for Traxxas UDR vehicles. Using this will help keep the body roll to a minimum while out bashing. Features: Designed for quick response, this system use a 3mm spring steel torsion bar to keeps torque twist and body lean to a minimum during acceleration and cornering HD 3mm sway bar tuning Aluminum sway bar arms have three mounting positions to fine tune the