A4 1.8t Sport vs. S4
#11
Based on what I've read, yes. Unfortunately I didn't find this out until after I did the A8/TT upgrade, so I don't know for sure.
#12
well the tt caliper uses the same spacing as a4 with the smaller mounts or it wouldn't work on all b5s. so i don't think the bigger size is possible. i know the b6 uses the larger spacing. i have a comparison picture somewhere ill throw up.
#13
btw, jon does your cruise control work with your ABS down?
#20
a8 -312
s4 -321
front s4 also two pots and way bigger.