Very nice , what made him go for 3 1/2 inch exhaust over 3"?
Well I think I will go for the 3" system this week for my Vectra, same style tail pipes as well. Cheers
3" cat back system is pretty pointless if you still have the lesser diameter front pipe or pre-cat downpipe
Well I don't have a front pre cat like some of them do. I might go for 3" from the Turbo back?
Then for maximum performance you would need a sports cat, downpipe etc...
ive got mates that have turbo cars and they all run 3" turbo back systems mostly custom made and every one has seen powergains... e.g mazda 323 gtr 220bhp standard full zorst made 265 with 1.5 bar boost. seat leon fr. 245 standard, remap and full 3" 320 bhp.. 25bhp he got from turbo back system on the leon.
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