POL -12″ Black OutTrack 4, rear disc brake conversion by Baer takes your braking performance to the next level. This system features the Track 4 aluminum 4 piston caliper mounted to a 12″ drilled and slotted black zinc 1 piece rotor. The Track 4 caliper has D.O.T compliant dust and weather sealsand uses the DR1 or HB100 pad. The unique billet backing plate not only acts as the brake caliper mount, it houses a modern 1 piece parking brake shoe assembly.