Dude: No offense but this s-car list is for the five cylinder 20 V turbo cars: The 200 20vt, the S2 20vt, the RS2 20vt, the 1992-94 S4 and the 1995-97 S6. You might get an answer about the 2.7 L tt S4's from listers here but you will be better off asking a different audifans forum or on the correct AudiWorld forum (B5 S4). Dave F.