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  1. (Non-Si)
    Basically I was looking into Magnaflow universal mufflers but there are so many different factors line inlet size and shit, and I'm not a gear head, so I don't know how I can determine which muffler will fit on my car properly. I was looking into something like this ... Magnaflow Muffler, 14325...
  2. Exhausts and Downpipes
    This thread is dedicated to Magnaflow exhaust systems for the 9th Generation Civic Si. Please keep information/questions about this particular brand of exhaust system limited to this thread to avoid confusion on the forums and to keep it neat and tidy. Specs: Material: 100% Stainless Steel...
  3. Bolt-Ons and All-Motor
    im already planning for my mods to the car even before i get it. but since im probably going to be putting nitrous on it im thinking of changing the headers at the same time. is it worth that extra money to get some nice 4-2-1 headers?
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