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Sockethead
05-24-2016, 10:02 AM
Interesting video on exhaust size vs HP and torque:

https://www.youtube.com/watch?v=_PVXvHkr-Vs

BMWCurves
05-24-2016, 11:32 AM
For the lazy, jump to 4:30 for 2.5" exhaust test and 9:44 for the 3" exhaust test.

Interesting video though, thanks for posting.

Vas
05-24-2016, 11:44 AM
Majority of exhaust are 2.5" however there is power to be made with a 3" exhaust even on a n/a engine.

UUC Corsa is a 2.5" full cattback correct?

Sockethead
05-24-2016, 12:07 PM
yes and the mufflers/resonators are all a strait through design