Wilwood 120-17458-RD AERO-DM Caliper, Right-Hand, Red, 1.75/1.62/1.62" Pistons For 1.30" Disc Fits Wilwood Big Brake Kit ONLY -***- Wilwood's AERO6-DM forged six-piston calipers from Accesspeed deliver heavy duty stopping power for the street and off road. The caliper incorporates race technology into a body design with widespread adaptability. With variable lug geometry, the AERO-DM offers direct spindle mounting with proprietary 13.38” diameter rotors on many late model trucks with multiple options for piston volume give this caliper the versatility necessary to suit all types of heavy weight braking requirements. The new AERO-DM the latest innovation to the AERO6 series of calipers. It has been designed with internal fluid ports that eliminate the external fluid cross-over tubes and massive center bridge assembly for extra rigidity.