FMF Powercore 2 Shorty Silencer Kawasaki KX250 Based on the performance-proven platform of the Powercore 2 Silencer, FMF created the Powercore 2 Shorty Silencer, which utilizes a shorter aluminum canister and inner core. This design decreases the amount of back pressure in the muffler, which on a 2-stroke will increase throttle response and low to mid-range power. If you spend most of your time riding on tight tracks and trails, the Powercore 2 Shorty is the silencer for you. Features: Delivers more bottom end power Excellent choice for tight tracks and trails Can be used with stock or FMF pipe Weight: 2.1 lbs 100% Made in the USA