The Pro Circuit R-304 is a compact, full-race 2-stroke slip-on silencer designed for strong performance gains on closed-course tracks. Built for durability and easy maintenance, it’s quick to repack and made in the USA.
The Pro Circuit R-304 Silencer is a full-race, two-stroke slip-on built for riders who want maximum performance from a compact exhaust design. The short aluminum canister is engineered to deliver optimal performance gains, making it an excellent choice for serious motocross and closed-course racing setups.
Maintenance is simple and fast thanks to hex head screws that allow quick disassembly for repacking. With durable TIG/MIG welds, double-walled mounting brackets, and long-life E-Glass internal packing, the R-304 is designed to handle hard riding and consistent race use.
