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expansion chamber washer

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it does exactly that. protect the flange. but, you can also tune with them. you can stack up multiple washers, to effectively extend the head pipe, and boosting lowend throttle response. its not a huge improvement, but it does work.

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the pipe mounts are 2 pieces of strap metal with a rubber center. So very easily.

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By running the spacers you can end up with only 1 not 2 orings sealing the pipe/jug intersection. The 4mm is the most you can get away with and have 2 orings in the game I believe.

The pipe still fit fine.

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