FMF Factory 4.1 Exhaust System Yamaha YFZ 450 09-22

FMF - Flying Machine Factory - 1973 was founded by a twenty-two-year-old named Donny Emler, a typical Southern Californian who, like everyone else in the 1970s, found a passion for riding and racing dirt bikes. FMF is now one of the most recognizable logos in motocross. The main area of ​​FMF is the highest quality exhaust systems for dirt bikes.