The Pro Circuit R-304 is a compact, full-race 2-stroke slip-on silencer built for maximum performance on closed-course tracks. Durable materials and service-friendly design make repacking quick and easy.
Get full-race 2-stroke performance in a compact, track-focused package. The Pro Circuit R-304 Silencer is designed to deliver optimum performance gains with a short aluminum canister that keeps the system tight and race-ready. Built for riders who demand durability and easy servicing, it’s engineered for closed-course racing where response and power matter most.
Its service-friendly end cap design uses hex-head screws so you can remove the inlet cap quickly for fast repacking—helping maintain consistent sound control and performance over time. With a stainless intake tube, robust mounting bracket and quality welds, the R-304 is made to handle the abuse of motocross and aggressive off-road riding.
