Hello,
I have also some questions about exhaust so i will not open a new thread, i will ask here if you could help.
I am going to upgrade the hole exhaust system and then make chiptuning 1st stage. At the exhaust shop guys told me that we should upgrade the hole down pipe at 63mm with a racing catalyst converter moved under the floor. The rest exhaust will be 60mm till the end.
I think that the part of the dp between turbocharger and catalyst is 67mm and should not be replaced but the guys disagreed with that telling me that all the dp comes one with catalyst.
What is your opinion about this upgrade and what kind of upgrades have you done?
I am talking about a Bravo t-jet 120.
Thank you!