See: RDRP

Revolution Design Racing Products have introduced new brass rear weight for the team Associated RC8B, RC8B3e, RC8T3 and RC8T3e. The brass rear weight is a quick and easy solution to add weight to the rear of the chassis. The CNC-machined part is made of high-quality brass material, it comes black anodised and adds to the RF suspension block using the kit’s screws. Adding weight in front of the rear axle greatly helps to gain traction on slippery surfaces while also making for a more plush ride over very rough terrain.