* model not adaptable to the body of origin. 30. Requires New OXA Header More torque and smooth power delivery at high revs.. 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! Together with the expansion chamber that broadens the power range these mufflers make for the full package! OXA Factory silencers achieve the best results! Improved torque Enhanced power delivery at higher revs FIM dB noise regulation compliant Tested and used by world-class riders such as Graham Jarvis, Wade Young, and Alfredo Gomez Aluminum construction with double reinforced brackets OXA high quality packing material These mufflers are NOT spark arrestors. The images shown are generic and do not necessarily reflect the specific characteristics of the product in question.