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FMF - Powercore 4 Exhaust (ATV)
The PowerCore 4 is the original race design muffler. Aluminum construction and stainless steel Hi-Flo endcaps make for the perfect balance of performance and strength. If you’re looking to give your ATV a boost, the PowerCore 4 has the perfect power to price ratio.
Completely redesigned for all late model applications
Aluminum performance muffler with durable stainless steel components
99dB sound level with optional quiet insert (-3dB)
I put one on my 04 XR250r, WOW what a difference it made all the way through each gear, great range of power. Its a little loud when you gas it and for the trails. Colorado in 2010 has sound restrictions being implemented, any way to quit it down a bit, it says 99db and -3db with quit insert but i cant find the insert?"