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      02-12-2012, 10:36 PM   #3
northern2020
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Drives: '11 X5 M / '01 B5 S4
Join Date: Jan 2011
Location: Alberta

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Quote:
Originally Posted by sarvar91
Hello,

I have installed a rear section exhaust mufflers from supersprint (hamann) and planning to add down pipes as well.
Akrapovic just released one for cheaper than supersprint, is it ok to change between after market brands fr exhaust or better to keep it all same brand?

And would changing downpipes void my warranty since it adds hp???

Thanks!
Brand is not an issue..

Build quality is!

Also the diameter of the Downpipes should be at least 3"...

Some start at 3 and taper to 2.5, but I don't know specs of the major manufacturers.

AR design I believe are 3"
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