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Audi A4The Audi A4 model offers nimble handling and performance that makes it one of the leading cars in its class. Read more about the Audi A4 in the Audi A4 review.
I have a stock exhaust system on my car, and GIAC software and lets just say if I floor it in third at 2k rpm and let the turbo spool, you can hear it two blocks away w/o ambiant noise