- Produces a wide powerband that increases torque and horsepower throughout the entire rpm range
- Direct bolt-in replacement for M8 engines; can be used with stock valve springs, pushrods, lifters and exhaust
- Will respond well when used with slip-on mufflers or full exhaust system and a high-flow air cleaner
- Feuling recommends using mufflers with smaller cores for the best low rpm power and pull.
- Made in the USA
- Not for '23-'24 models with 121" motors.