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Message: [QUOTE="reepicheep, post: 1380927, member: 104942"] Whoops! Sorry I missed that the first time. You are running an FMF Gnarly for the expansion chamber? Aren't those all torque pipes? Or do they make the rev pipe in a Gnarly as well? On the 200, there are two FMF pipes... a torque pipe and a rev pipe. They have different part numbers. I think the torque pipe is a smaller expansion chamber (11" in circumference) and the rev pipe is 14" in diameter. All well and good... But because of the different porting and geometry of the 220, the rev pipe acts like a torque pipe, and the torque pipe acts like... well... junk. Could you have a torque (woods) expansion chamber on there instead of a rev (desert) expansion chamber? [/QUOTE]