hey im thinkin of putting new exhaust set up on my 8 ,at the moment its got extractors an stock cats i think? 3.5in midsection into 3in resonator an rather long tail pipe so i was thinkin of replacing for the dual catback exhauzt of a fg xr8..would there twin pipe design be better for performance

I think that would certainly pick the bottom end back up where the 3.5" single would have lost it.

it goes 3.5in midsection into a 3in resonator an 3in outpipe..i passed on the fg dual exhaust coz someone said there heavy an have sum strange flow thing ,like a reverse flow exhaust or something so i didnt get it..