BMW E60 Japanese Spec factory brake system upgraded with ATRT high performance big braking system.

[Touring Specification] 
ATRT ZS-IV forged Big 6-piston brake caliper + Ø355mm 2-piece full floating brake disc in the front.
ATRT ZS-IV forged Big 4-piston brake caliper + Ø355mm 3-piece rear drum brake disc in the rear.

[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