exhaust system size: video

[Sockethead]

Interesting video on exhaust size vs HP and torque:

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

[BMWCurves]

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]

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]

yes and the mufflers/resonators are all a strait through design