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Thread: Supertrapp to fit 3" megaphone

  1. #1
    4strokenut23 Guest

    Default Supertrapp to fit 3" megaphone

    I'm building an xl350 (bored and stroked to 448) for vintage motocross and trying to decide if I should custom make a megaphone 1.75 to 3" dia. and weld a supertrapp on the end or just go with a universal 1.75 inlet. I guess my real question is do you think by not going with the megaphone I'll be giving up HP.

    Thanks 4strokenut23

  2. #2
    bschultz Guest


    If you were running in a narrower RPM range like a Flat Tracker I would say yes; however I believe one of he off-road Universals such as the IDS2 or 4" Aluminum Racing Series will serve you just as well.

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