A4 (B5 Platform) Discussion Discussion forum for the B5 Audi A4 produced from 1995-2001 B5 FAQ

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Old May 5, 2005 | 10:12 AM
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Sexy Blue A4's Avatar
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Default NEED A QUICK ANSWER

Hey, what is the stock piping size on the B5 1.8TQM downpipe? Thanks
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Old May 5, 2005 | 10:17 AM
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Default i want to say 1.75"

*edit* 1.75" is for dp back
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Old May 5, 2005 | 10:27 AM
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2.25" IIRC
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Old May 5, 2005 | 10:30 AM
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Default IIRC? what does this stand for?

what does IIRC stand for?
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Old May 5, 2005 | 10:30 AM
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he is right
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Old May 5, 2005 | 10:30 AM
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haha yeah im wondering too
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Old May 5, 2005 | 10:32 AM
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I think it's If I Recall Correctly
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Old May 5, 2005 | 10:34 AM
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Default So far i've gotten as low as 1.7 and as high as 2.25. which is it! heh

I'm thinking about upgrading my downpipe with the borla system but if the stock downpipe is already 2.25, getting another one would be how much more useful?
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Old May 5, 2005 | 10:40 AM
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Default downpipe helps mucho! get it, helps w/spooling. look for reviews where people put on downpipes...

after getting exhausts w/out downpipes.

i believe there are some exhausts that are dp back. some people get those, then get a custom dp after, claim it makes a huge dif, as much as the exhaust itself.
you might want to get a 2.5" downpipe if that makes you feel better about getting the exhaust (since 2.5 is bigger than 2.25). milltek uses 2.5" downpipe/2.75" piping back.

also, i was wrong on the 1.75" dp. i searched and that's what a few posts said.... but then when you search for "stock downpipe 2.25" you get much more results and people also say its 2.25". i was confused too.
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Old May 5, 2005 | 12:00 PM
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3rd
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