The Traxxas 9664 Shock Caps are replacement caps designed to seal and protect the top of your shock absorbers while helping maintain proper oil containment and damping performance. Made from durable material for long‑lasting use, these caps help keep dirt and debris out of the shock body and support consistent suspension action. They are compatible with Traxxas Slash 4X4, Stampede 4X4, Rustler 4X4, and Rally 4X4 models, making them a dependable replacement when servicing or rebuilding your shocks.