Hi guys

Could you tell me what's the correct exhaust I should have on my GC8?

It will have a EJ207, VF34, Processwest TMIC, silicone intake, upgraded injectors, Blitz Spec S boost controller and PowerFC.

The two most common things that I have been told are....

TBE 3" all the way
or TBE 3" with 2.5" diff back

Suffice to say it will have the CAT, silencer n muffler.

But which one???

Thanks guys.