Octavia Superb Rear Big Brake Disc Upgrade Conversion Kit Electric Handbrake 310 August 31, 2024 admin FOR CONVERTING YOUR REAR BRAKES TO VENTED. 310MM DIAMETER VENTED REAR BRAKE DISC CONVERSION. 2 X NEW REAR VENTED DRILLED GROOVED 310MM DIAMETER BRAKE DISC. 2 X NEW REAR ELECTRIC BRAKE CALIPERS COMPLETE WITH CARRIERS + BRAKE PADS.