[benoit454]

very true I heard the sae thing. it also applies to pipe size for the whole system, which in short means it's easier for velocity to move gasses out of a 2-1/4 or 2-1/2 pipes then it is to have a huge 3 inch pipes that's not really needed. Velocity is gonna be lower and not help to pull the exhaust out faster as it would with smaller pipes.

The larger pipes do sound deeper, but unless you got some big power maker or something it's not really needed.