[Zedn]

Hi all,

Just wondering if those who have passed now noise test in the last few years can tell me what exhaust set up they used? I have factory ls3 cats, two hsv centre mufflers, but then not sure what else to put on it. Was think of just buying another 2 mufflers for the rear but don't know if that's quiet enough.

Also what pipe size? Was thinking 2.5"