RCT (Resonance Chamber Technology) features a patented core shape that lowers decibels while maintaining maximum power output Internal ducts in the chambers of the RCT system increase internal volume for improved exhaust flow, resulting in power gains throughout the entire range of power FMF's Factory Forward Engineering centralizes mass and is less prone to crash damage Innovative rear end cap features simple installation of tuning tip inserts or spark arrestor with the removal of four screws Compatible with stock header or FMF header Meet AMA and FIM sound requirements QuietCore 94db insert included Spark arrestor included in muffler Available in natural titanium or blue anodized finish with titanium or carbon fiber end caps Made in the U.S.A. .
I replaced my stock pipe with the FMF and all it did was make it sound wimpy and took away lots of back pressure that the stock pipe supplied. I entered a race without testing and was blowing through corners and was annoyed with the tone that the pipe was giving my motor. It looks bad ass but i will be selling a brand new pipe with one ride if your interested let me know