Description
The FMF Factory Fatty Big Bore Exhaust is engineered for riders who demand measurable gains in power delivery and throttle response without sacrificing durability. Built using the same construction methods trusted by professional racers, this exhaust combines strategic material selection with meticulous hand-finishing to deliver performance that lasts. If you’re looking for proven power with factory-quality craftsmanship, this is the real deal.
- 19-gauge steel headers
- 20-gauge steel body
- Weight-optimized design
- Hand-pounded seams
- Pro-rider tested
- Factory finish quality
- MPN: 025224
- Bolt-on installation






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