I have a 1995 A6 Quattro Wagon and am interested in modifying the throttle body. Has anyone done this? Does it work OK with the automatic transmission, or will I be getting harsher downshifts? Is TAP the only place to get this done now that Schaumburg stopped? Thanks. Joseph Chen 1996 A4 Quattro - For sale now that I bought the wagon 1990 V8 Quattro