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3.0tdi Quattro with 2.0tdi back box

martyj200 Feb 15, 2019

  1. martyj200

    martyj200 Registered User

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    hi all, looking for a bit of advice, I have a 2007 3.0tdi Quattro and I’m being offered a pair of rear back boxes for my car however they are from a 2.0tdi. I am told that they will be fine on the car but will need a sleeve to adapt them to fit.
    My question is, would these hinder performance or anything else if I got them installed?
    Thanks
    Martin
     
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  3. desertstorm

    desertstorm Moderator Staff Member Moderator VCDS Map User

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    Why are you fitting smaller back boxes to your car? . Probably lose a few bhp right at the top end but nothing you would really notice compared with the OE 3.0 TDI system.
     
  4. B5NUT

    B5NUT Well-Known Member VCDS Map User

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    Have to say I would not want to be fitting 2.0 TDI back boxes on the 3.0. Have you damaged your current system?
     
  5. martyj200

    martyj200 Registered User

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    Thanks for reply, I have done a rear facelift conversion and can only find rear system from a 2.0 to facelift.. I asked the seller and he says he checked it will fit without issues. But I just wonder if it will restrict flow or power?
     
  6. B5NUT

    B5NUT Well-Known Member VCDS Map User

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  7. RS4B5

    RS4B5 5 pots

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    Just go for a custom y piped mufflerecotmy
     
  8. martyj200

    martyj200 Registered User

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    Yes I see what you’re saying good point as to wether there would be obstruction with the 2 pipes having a wider gap, I have the option of 2 back boxes only from a c7 3.0tdi do you think these would be a fairly straight forward swap for a exhaust place to put on?
     
  9. martyj200

    martyj200 Registered User

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    My main goal here is to keep the car as OEM Look and hopefully not hinder the performance. Thanks
     
  10. martyj200

    martyj200 Registered User

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    When I say c7 back boxes I mean pre facelift round tips, do you think these would be a fit? Thanks
     
  11. B5NUT

    B5NUT Well-Known Member VCDS Map User

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    C7 are a completely different shape, don't think they are going to work at all.
    upload_2019-2-15_10-52-59.png
     
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  13. martyj200

    martyj200 Registered User

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    Would it just be the diameter of the pipe going into the back box for the 2.0 face lift that would be the restriction or the internals of the back box it’s self? Thanks
     
  14. Simon968

    Simon968 Registered User

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    Can't you stick with your originals and get some custom tailpipes fabricated?
     
  15. Mollygoogle

    Mollygoogle Registered User

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    I’ve had the backboxes deleted on mine. I used OEM style tailpipes
     

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