Features: POWERCORE 2.1 SILENCERS. The all new PowerCore 2.1 silencer is proof FMF is totally committed to 2-stroke progression.FMF loves 2-strokes, they ride 2-strokes, and they are devoted to delivering superior power to the 2-stroke faithful.. Race-tested, smooth power curve throughout the RPM range.. Engineered to assault today's tracks and trails. Larger diameter canister for more tunability and longer lasting packing life.. Delivers a crisp, notable sound.. Lighter than stock.. Optimally designed to complement performance of FMF pipes; works and fits FMF or stock.. NOTE: Will not pass 2025 FIM sound regulation.