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I was wondering why there is a heated O2 sensor in the crossover section of my stock 06 Max pipe. There seems to be no where to plug it in.:ummm:

I have UFO with 4 megaphones. It seems a bit loud with the 2 1/2" tips. If I switch to the 1 1/2" tips would it make any difference in jetting or performance? I would imagine the four small tips would outflow the engine anyway. I wonder about the 2 1/2 inch core slamming into the 1 1/2" opening...

I just bought myself an 06 Max with only 3600 miles on it with a bunch of aftermarket goodies. My question is it has UFO exhaust that expands back from the 2 to 1 collector under bike to 2 megaphone cans. It is crazy loud!! Does anybody else have something like this? Are there smaller aluminum...