Retail price $799.95 Our price $699.95 You Save $100.00!
The Factory 4.1 is FMF Racing’s premier performance exhaust system incorporating every conceivable technological advantage taken from the thirty plus years of our racing heritage. Featuring proprietary trade secrets such as the uniquely designed Chamber Core and exclusive PowerBomb header, the Factory4.1 is guaranteed to produce more horsepower throughout the entire RPM range! The impressive gains observed on the dyno do not give justice to the power that’s put to the ground. After all, would Factory KTM or Yamaha of Troy use anything but the very best performing exhaust systems?
