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  1. BMW Performance intake review #3 w/dyno

    General E46 Forum
    Okay, so I had my car in the shop today for a before and after dyno...before w/ stock airbox and after with the new BMW Performance intake. The shop has a dyno pak machine...more commonly referred to a "mustang dyno." So the numbers are lower than you'll see on a dynojet. As I stated in my...
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