2 links
Audi S4 Owner's Resource
s4biturbo.com
A collection of useful links, articles, and timeslips for the Audi S4 Biturbo enthusiast.
Cars.com: 2001 Audi S4
cars.com
Cars.com reprints a review of the 2001 Audi S4, that was written by Tom Incantalupo of 'Newsday.'
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