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How much speed increase will a pipe add to stock gsr40?

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  • How much speed increase will a pipe add to stock gsr40?

    I was looking to add a pipe to a stock gsr40. How much speed do you think an aftermarket pipe will add to an all stock engine?

  • #2
    Depends on the pipe. 3mph ish. Definitely worth it for the mid range/acceleration. I’ve always done supporting mods carb/gearing/filter at the same time so it’s tough to get a direct comparison.
    *******Pedding since '02********