Girodisc Audi 356mm Rear Rotors Walbro The top rear port is

The top rear port is commonly used for aftermarket fuel pressure monitoring

Despite it's size and features

OPTIONAL OVERSIZE BEARINGS

resulting in faster engine revs and less parasitic loss

Performance Gains: Achieves an increase of 11–16hp and 12–17ft-lb of torque at the wheels on stock setups

Girodisc Audi 356mm Rear Rotors Walbro The top rear port isThese GiroDisc 2 piece rotors are a direct replacement for the 356x22mm rear rotors on Audi C7 S6 S7 RS6 RS7, as well as others. Our 2 piece, fully floating assemblies help shed unsprung weight and rotating mass from the front axle of the vehicle. The rotor rings are machined from a proprietary casting made of high carbon iron formulated to GiroDiscs specifications. This superior metallurgy results in a rotor that holds up better, and the 48 curved