These Hard Enduro edition mufflers are about 3" longer than "stock". This provides more backpressure to the engine enhancing low end torque and smoothing out the top end. Graham, alfredo, etc. all run these longer mufflers on their race bikes for that extra edge! When combined with the expansion chambers that broaden the power band, these are the perfect package!
These mufflers are NOT spark arrestors. This is close to the stock length, and runs great!