Details FMF's Gold Series Fatty Moto is one of their most popular pipes because it provides a smooth power band, increases in power all along the curve, and better control regardless of where you are in the power band. Unusable peaks in power will be leveled out and more power in the lows and mids will be added. The top end doesn't suffer since all the original punch is maintained along with more over-rev. That means more fun all around no matter the type of riding you like. Why? Because with more usable power you get a better hook up during acceleration and more control while you ride aggressively on dicey terrain. And with FMF using their Tru-Flo stamping process and signature nickel plated finish, contours are consistent and corrosion is kept at bay throughout the header pipe's steel body. Specs: Improved power throughout band Increased over-rev Smooth power delivery Carbon steel body with nickel plating prevents corrosion Tru-Flo stamping process ensures proper contours and fitment Most models include new O-rings Made 100% in the USA