2010 Benz W221 S400 original factory brake system upgraded with ATRT high performance big brake kits.
 

[Touring info]
ATRT ZS-IV big 6POT brake caliper + Ø355mm 2-pieces cross-drilled and slotted brake rotors in the front.
 

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