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I saw the best "seat of the pants" response when I went to a straight thru to the back and dumped all the turns and bends in the exhaust flow. Although I was surpercharzed, moving to a 3" exhaust diameter really did not deliver the effects that the straight exhaust delivered.
(Balance this with your ability to pay LOUD EXHAUST tickets from the local police jurisdictions.)
BTW research indicates the hotter the exhaust tubing the faster exhaust gases pass thru it. (wrap those headers!)
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