2011 AUDI S4 Avant (B8) upgraded with ATRT high performance big brake kits.
 

When you add power, you need to add braking. Not to worry – this big brake kit will help you stop in a hurry.
 

[Touring Specification] 
ATRT ZS-IV big 6-piston brake caliper + Ø380mm 2-pieces full floating cross-drilled & Slotted Rotors.
HHC Ø370mm full cross-drilled brake rear-Rotor. 
 

[Feature]
#Forge Products (Material 6061-T6 from Taiwan)   
#CNC mrilling machine Proces                            
#Anodizing Aluminium Proces                             
#2 cooling vents patents designed by ATRT racing