Just after a 2nd or even 3rd opinion on if safe on engine, I am having full standard exhaust system put back on my VE SS on Friday, car is tuned with dpe bigby system and 224/228 580 600 110 cam on a safe road tune, to have any chance of passing 5 gas analyser tet and noise test ect the standard system has to go on, GOD DAMM IT!
Putting on VE HSV Headers and cats +plus ve ss stock catback,

Anway he tuner said its ok, to run current tune with std system, what is it ok in your opinions?