Don't do it! I had one and ran it for only a few rides till I went back to stock. Sold it for 1/2 cost and it was just like new. Ah, nice and quiet now. They give a slight bottom end boost and sound pretty good just chugging along at a slow clip on the trail. But the inline twins sound like a giant pissed off bumble bee when you open it up. It will deafen and piss off your riding buddies if they are behind you. You can also forget about EVER seeing any wildlife on the trail. Just my $.02
I agree with polman500. If you went with the whole kit like I did there is a good power gain but its LOUD. I kept my oem muffler & slap it on for hunting or sight seeing, but to rip it up or mudding I put the aaen back on, its a easy 5 min swap & dose not effect the way it runs.
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