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quattro performance back box needed

Discussion in 'A4/S4 forum(B5 Chassis)' started by jamie226bhp, Nov 19, 2010.

  1. jamie226bhp
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    jamie226bhp Member

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    As above i need a milltek or similar back box for my 1.8t quattro have the cat back in milltek already but a new back box is about £230 and i'm on a budget,
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  2. ian52
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    ian52 2000 a4 1.8tqs-yellow

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    Whats wrong with the milltek?
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  3. jamie226bhp
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    jamie226bhp Member

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    Didn't come with one but the other bits were new and only cost £220
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  4. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator

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    Stick a used S4 one on for now?
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  5. jamie226bhp
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    jamie226bhp Member

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    What diameter are they as the milltek is 2.75 I think wad looking at getting a universal one and making it fit but they only come in 2.5 and 3 inch
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  6. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator

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    S4 is just over 2.5 iirc.

    Still i'd rather nail on a nice OEM S4 backbox than bodge in a universal thing, and they can be picked up for buttons.
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  7. jamie226bhp
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    jamie226bhp Member

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    I'll look for an s4 one then
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  8. Broken Byzan
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    Broken Byzan Photographic Moderator Staff Member Moderator

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    Them Xs power stainless ones go silly cheap sometimes. May be worth taking a punt and then getting a 2 into 1 adapter made to fit it

    I have an OEM S4 system on mine from just in front of the mid box back
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  9. jamie226bhp
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    jamie226bhp Member

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    Yeah I'll keep a look out for a standard or xs one
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  10. jamie226bhp
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    jamie226bhp Member

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    will rs4 back box work with a little modding as just trying to give myself more options
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  11. ian52
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    ian52 2000 a4 1.8tqs-yellow

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    Cant you just get a custom one made?
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  12. jamie226bhp
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    jamie226bhp Member

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    yeah about £120, so a standard s4 woul be a cheaper option
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  13. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator

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    I suspect the tailpipes on the RS4 one wouldnt fit all that well, but the backbox itself will fit, and it will be a closer match to your 2.75" system too.
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  14. nwmlarge
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    nwmlarge flat out

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    is that after the suitcase box?
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  15. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator

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    suitcase box?

    There are only two boxes in an S4 system, the backbox and the middle box. The middle box has a Y on its inlet, then a single 65mm pipe from that to the back box.

    Mark cut off the Y, and welded a 3" pipe on instead, linking that to the 3" downpipe/cat that he also installed at the same time.
    #15

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