If you make the bulk of you power betweed 3500-6000 rpm, an open exhaust will probably hurt you.
I was spraying a dry 150 shot with turndowns, added tails and I swear the car felt slower. But I picked up 1 mph at the track. Go figure, loud does not mean fast.
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1988 Mustang GT
stock bottom 302, C4
10.9 @ 128 with 8 psi of Novi 1000 boost!----STOLEN
1989 Mustang notchback
Warmed up 306 with a Procharger.
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