FMF Racing Gnarly Pipe for Honda CR500R 89-01FMF Gold Series Gnarly Pipe Honda CR500R The FMF Gnarly Exhaust was designed to be rugged, and improve bottom end power to help get you through the toughest terrain. Developed and tested with the off road rider in mind, the Gnarly will shift and increase the power band so it comes on sooner, pulls harder through the mid range, and smoothes out the top end RPM surge. Constructed of thick nickel plated 18 gauge carbon steel, this pipe is ready to take