help dp issues
03-22-2004, 08:19 PM
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help dp issues
Ok my drag DP has a stock gsr flange welded to it. So it goes from 2.5 down to like what 1.75 back up to my 2.25 n-1 catback.How much does this effect my hp, and where can i get a flange.
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05-17-2003 09:19 AM