FATTY PIPE: With well over 35 years of racing experience behind it, the Fatty Seriespipe 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 (unless noted) FMF'S most popular 2-stroke pipe O-Rings included Fits: Gas-Gas MC 65 2023 GasGas MC65 2021 Husqvarna TC 65 2023 TC65 2017-2021 2023 KTM 65 SX 2019-2023 SX 65 2023