An excellent addition to my Q-4 can. FMF high quality. Didnt quiet the bike so much, definetly helped low to mid range. Went with the carbon guard as well, trick and keeps those roost dings down. Saves your pants too!
This along with a powercore slip on made a huge difference in both power and sound...compared to the Big Gun Evo X that I had been running, this thing is practically silent. Highly recommended...
Excellent header along with the FMF Factory 4.1 Ti slip on muffler the sound is great and the really rips now
Just installed one on my CRF450X and it fits great and when installed along with a Powercore 4 it gives a great note and feels as though it has added some more power
Great pipe! Works great with my Pro-Circuit T-4 silencer. It sticks out a bit more than the stock pipe though and you really need a heat protector of some kind to keep from melting your boots. So don't get it unless you have a protector too.