The GPM Aluminum 6061-T6 Front L-shape Piggy Back Internal Dampers are a direct front suspension upgrade for the Traxxas Unlimited Desert Racer. Built from 6061-T6 aluminium, these dampers are intended to improve suspension compliance and deliver consistent oil displacement for better damping response. Tuning is achieved through the top spring retainer and the red screw at the bottom of the negative pressure oil cylinder, enabling clear adjustments to spring preload and overall ride stiffness.