The Alcon rear brake upgrade for 2007+ Jeep JK with 6x5.5in hubs includes 4‑piston red calipers and 355x22mm rotors for Currie 60/70 configurations. Offered as a rear axle kit for these JK hub types, manufacturer data cites reductions in disc temperature rise, lower pad work rate and decreased pedal effort compared with standard rear braking components.
Alcon 2007+ Jeep JK w/ 6x5.5in Hub 355x22mm Rotor 4-Piston Calipers Rear Brake Upgrade Kit - Red