3 1/2" versus 4" downpipe
03-03-2009, 10:36 AM
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3 1/2" versus 4" downpipe I'm looking into some truck manifold setups and I can fit a 3 1/2" dp but can't do a 4" without swapping K members. I'm running a 408 w/S91. How big of a difference is the largers DP?
