FMF has been around since 1973. They know what they do for motocross and supercross bikes!
FMF Racing’s SST two-stroke pipe increases mid range pull & extends the over-rev considerably, while sharpening the off idle throttle response. It also offers a linear power delivery that the patented SST is known for. FMF Racing’s Tru-Flo stamping process ensures a perfect fit and optimum performance. Chrome plated for everlasting appearance and durability.
From one member of Supercross.com’s Community: Made more power everywhere. The SST Pipe with a pro-circuit shorty silencer gave more rev-out in every gear and it sounds great too.
For more info on FMF Racing products, check out http://www.fmfracing.com