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  1. C

    2 1/2 vs 3 inch exhaust

    Is there a rule of thumb or formula ( head flow, cam, ci, rpm,etc) regarding engine output to exhaust pipe diameter selection? I've read the forums till my eyes got blurry but there was no real consensus on 2 1/2 vs 3 inch, all the info was anecdotal. I would think theres a point where the...
  3. C

    max wedge exhaust

    Hello, does anybody know who makes headers that will fit a mw ported 452 head? this will be going in a 70 440 charger. Thanks
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