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Thread: 3" Turbo exhaust system?

  1. #11
    Regular Member signumboy's Avatar
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    Engine : 2.0 Ltr Turbo

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    Quote Originally Posted by Mark2.2 View Post
    Have you recorded it while it's on the move yet, need some sound clips mate
    My son got 3 1/2 inch cat back fitted to his and he has stage 1 he swears there is an improvement ....i swear its louder i have pics while it was getting fitted somewhere if i can find them ...his motor is the same as yours to




  2. #12
    Regular Member Mark2.2's Avatar
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    Very nice , what made him go for 3 1/2 inch exhaust over 3"?

  3. #13
    Regular Member signumboy's Avatar
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    Quote Originally Posted by Mark2.2 View Post
    Very nice , what made him go for 3 1/2 inch exhaust over 3"?
    He told me less restriction for the exhaust gases and more power ...i might have it wrong maybe it is 3" but im sure he said three&half

  4. #14
    Regular Member Mark2.2's Avatar
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    Well I think I will go for the 3" system this week for my Vectra, same style tail pipes as well. Cheers

  5. #15
    On a Sabbatical daviek's Avatar
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    3" cat back system is pretty pointless if you still have the lesser diameter front pipe or pre-cat downpipe

  6. #16
    Regular Member Steven's Avatar
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    Quote Originally Posted by signumboy View Post
    My son got 3 1/2 inch cat back fitted to his and he has stage 1 he swears there is an improvement ....i swear its louder
    Phil where abouts was the exhaust fitted/made??

    Got to agree with Davie, the VXR astra boy's are getting the 3" exhaust from the turbo back..

  7. #17
    Regular Member Mark2.2's Avatar
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    Well I don't have a front pre cat like some of them do. I might go for 3" from the Turbo back?

  8. #18
    Regular Member Steven's Avatar
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    Then for maximum performance you would need a sports cat, downpipe etc...

  9. #19
    On a Sabbatical daviek's Avatar
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    Quote Originally Posted by Mark2.2 View Post
    Well I don't have a front pre cat like some of them do. I might go for 3" from the Turbo back?
    Best plan buddy as that's where you need the 3" if your after power gains

  10. #20
    Regular Member kamar's Avatar
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    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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