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Daz- The first thing in the header end is a tapered reducer that goes down to 1" in diameter. I assumed that was in there for back pressure. After all this discussion, I decided to totally gut my spare set of pipes and make some other type of baffle system. Was thinking of a pipe with holes in it that was small enough in diameter to go past the screw bosses for the hangers. Those 2 little nubs sticking into the inside of the pipe are all thats in there besides the stock baffle setup.



In the header? or in the beginning of the muffler? Is it an america or speedy and what year? I'm curious because my headers never had anything like that. But like i said i made reducers and they just killed the performance big time. But if you saw these in the header, this would keep even aftermarket pipes much less beneficial in power gains. This has me scratching my head. I can only think they are in certain models/years only, but even then why have i never heard of this before? Did you buy the bike used? If so maybe the former owner installed them?