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

Question: How important is a downpipe, horsepower/flow wise?

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Old Jun 3, 2003 | 03:08 PM
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Question: How important is a downpipe, horsepower/flow wise?
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Old Jun 3, 2003 | 03:13 PM
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Default any pipe can only flow as much as its narrowest section

so that should answer your question. There's not really any reason to go for an aftermarket exhaust unless it includes downpipe.
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Old Jun 3, 2003 | 03:14 PM
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Default think of it as when you were a kid...

you'd hold your hands to your neck when you didn't get what you wanted at the grocery store, mom said "no pez today nolan"

the more you let up on your neck (you didn't really choke yourself til you were purple) the easier it was to breathe. the rest of your body was workin good, but was still having trouble given the fact you were choking yourself.

downpipes are very important, it allows more exhaust gases to flow from the cat through the rest of your exhaust. as "simple" a component as it is, it may be the most important part of the exhaust system (meaning your muffler, mid-section and downpipe).
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Old Jun 3, 2003 | 03:15 PM
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hahaha... that's an awesome analogy
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Old Jun 3, 2003 | 03:34 PM
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;-)
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Old Jun 3, 2003 | 04:34 PM
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Default ahahhahah

too bad i cant relate to the analogy

i juss never got what i wanted
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Old Jun 3, 2003 | 05:45 PM
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Default Thanks Homie, that's a funny analogy and thanks chupacabra that's some vital info

I am going to have a guy custom make my exhaust, i think i'll get a downpipe for sure, does that make it loud?
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