With well over 35 years of racing experience behind it, the Fatty pipe delivers race-proven performance. The Fatty broadens and smoothes out the power curve while boosting gains throughout the entire power band, more low-end, more mid, and increased over-rev. No matter what type of riding you do, the Fatty has the benefits youre looking for. More tractable power, improved throttle control. Provides power gains throughout entire power band. Carbon steel with a nickel-plated finish for maximum durability. FMF Racings Tru-Flo stamping process ensures a perfect fit and optimum performance. Can be used with FMF or stock silencer. FMFs most popular 2-stroke pipe . Note: Pipe may include factory indentations for proper installation clearance.