With well over 35 years of racing experience behind it, the Fatty Gold Series 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 (unless noted) -Our most popular 2-stroke pipe -O-Rings Included Make Model Year HUSQVARNA TC 85 14-17 KTM 105SX 07-12 KTM 105XC 08-12 KTM 85 SX 06-17 KTM 85XC 08-09 Fits: Husqvarna TC85 Big Wheel 2014-2017 TC85 Small Wheel 2014-2017