The D154 Pro Series Rear Disc Conversion Kit with integral parking brake provides high-tech styling for the street and rugged durability for the toughest off-roading. Experience big brake stopping power from 12.19" diameter rotors and 2-piston floating mount calipers for ultimate control with big wheel and tire packages. These kits cover the full range of non-ABS Dana 35 rear axles in several Jeep models with bolt-on installation and full compatibility with the OE master cylinder output. The neatly hidden internal shoe system offers superior static holding power for parking. D154 Rear Caliper Kits also match Wilwood D52 or D154 Calipers on OE or aftermarket spindles.