98-99 HONDA CR125: Pro Circuit R 304 Shorty Silencer - 2-Stroke The R-304 Shorty silencer was developed as a full-race two-stroke silencer and was designed to increase power over stock exhaust. The compact design of the short aluminum canister offers optimum performance gains and is recommended for closed-course racing only. Hex head screws are used to secure the inlet cap and can be removed easily for quick re-packing of the silencer.304 stainless steel intake tube.Double-walled mounting brackets.6061 T-6 brushed aluminum housing.TIG and MIG welded for strength and durabilit