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post #15 of (permalink) Old 09-08-2018, 04:10 PM
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turbo2256b's Avatar
Join Date: Feb 2013
Location: KY, OH, MI
Posts: 1,747
best performance i have seen stock to a mild build with split headers is 1 1/2 to 1 3/4 duals or a very smooth y pipe connected to a single 2 1/4 exh system.
These set ups i ran in P or Q stock as rules changed using all ford parts except exh turned 14 flat to 13.96 depending on track conditions. .06 seconds less and i would have matched the class record at that time held by a paxton blown 57 factory ford wagon.
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