How may SNetters have proven figures where they had upgraded from a performance 2.5" to a 3" exhaust system? Preferably those still running a TMIC and performance panel filter as well.

Thanks

 

Be interested to know but pretty sure this question has been answered before?

Generally.

2.5 upto 350bhp and 3" for the guys running bigger power. I've got a 3" (exhaust) running 320 ish but would be interested to try a 2.5

 

Up

 

I'm running 340/320 on a 3" system with open neck downpipe, I'm changing to a divorced downpipe with 2.5" system to try get Abit better torque and throttle response, il post up next week to see if any improvements