will s4 b5 calipers work on a4 b5s? like are they direct bolt ups bc arent the s4s 2 pot and the a4s 1? thanks

 

u will need to change everything caliper carrier & rotor but i could not see that being a problem

 

but they are diff pistons right? so what is the carrier? u know of any right ups on this? i think im gonna do this bc i did the slotted and green stuff pads and it still felt stock. im not lookin to either spend thousands on a brake kit bc my car isnt that fast as to where i need em and im not a track racer.