are OEM brakes on the urs4/6 the same as a c4 a6....
 

i am interseted in doing a breake upgrade on my c4 to fill up the space in my wheels. i am thinkg of the 993tt calipers rs2 cariers and a8 rotors. will this work on my vehicle??? Any help would be great thanks.

I think they're different...
 

URs4 has the G60s, not sure what the S6 has.

The 2.8 V6 (AAH) has completely different brakes than the S4/S6 (AAN)...
 

The fronts on the AAH cars are single piston calipers instead of the (US) S4/S6's G60 dual piston, and the rears also have different calipers and solid instead of vented rotors.

Unfortunately, it appears that the struts/hub carriers are also different, so you would have to swap in at least the S4/S6 strut assemblies before you could do the upgrade, and you could also run into other incompatibilities (hub to CV, etc.)

UrS6 are the same G60's - A6's use single pot calipers.

yeah thats what i thought...ok now i must put the thinking cap back on
 

thanks for the help

that's not fair. :)

my OEM brakes has dual pistions with 4 brake pads/wheel.
 

with 314mm Rotor disc is this called G60?

Sorry to intrude, i'm running A8 rotors with tt carriers on my 95 A6.

You have the HP2 caliper that the 1994-> UrS4/S6 had in other markets than N America..