Hi, I'm new here, as you can see from my postcount, but I was wondering about the custom S/S exhaust expanding when being run for a period of time. I was going to mount a Supersprint manifold on my '90 G60 and custom make the rest of the system with cat, as I can't drive without that in Denmark, and a single silencer before the backbox. Much like to OEM system, but still with a lot higher flow..
But I'm not looking for extreme roar and unbearable soundlevels as I'm going to do quite a bit of freewaydriving too.
Wont this solution be good enough if I just keep the Ø below or precicely 2.5"?
Hope you guys can help me out..
Adam