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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.
im pretty sur to run a ko4 on a 2001 u need the j31 file which requries a front mount and also on any k04 u are gonna need to run exhaust to get the power u want
^^^ The j31 is for 01 and is for dbw which starts at 00. The pc-16 is for n-dbw which ends in 99.5. GIAC is probablly the best software you can get for the k04 for the b5.