the S4 is a wonderful car. stay away for the 2000 models because they have problems with the tranny that were not fixed untill the 2001 model year.
it's very difficult to keep an S4 stock because they have so much potential all you need is a chip, short shifter,exhaust and springs and your done. other than that its one of the best sleeper car out there. expect to pay 22-26k for one in great condition and low miles.
-2000 csvt silver frost #1619
-magnaflow 14415
-optimized T/B & y-pipe
-superchips xgt1
-75mm proflow maf
-K&N RU-3530
-fsvt smart pump # 354Z-9H307-BC
-spec stage one, LSD
-low-tek,a/f,oil press.,volts
-B&M short shifter
-17" konig gt-r
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