3" Becomes a theoretical restriction a little below 400hp. I have a feeling it was a part of my issue with overheating the headers/exhaust and melting plug wires. I would be interested in the difference between exhaust on and headers dumped while your car was on the dyno.
Though I know another chassis where people scream that you need a 3" exhaust and 2.5" has been proven to be no issue until around 400whp. So who really knows lol
Really excited to see this swap get up and running!
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