Taking the proven success of the Powercore 2, FMF created the Powercore 2 Shorty, with a shorter inner core length and aluminum canister. This design results in a finely tuned bolt-on performance silencer that maximizes bottom and mid-RPM power. An excellent choice for tight tracks and supercross track applications. The Powercore 2 Shorty silencer has a shortened inner core length and canister. The shorter overall length allows for the exhaust gases to exit quicker giving the silencer better performance through the bottom to mid-range of the power band. It is easy to perform maintenance on the Shorty silencer due to FMF using removable bolts which allow a simple break down. Note: For closed course competition use ONLY. Not intended for street use.