Alcon ALABKR5059D12 4-Piston Rear Heavy Duty Big Brake Kit 330x22mm Rotors Red Calipers

The Alcon BKR5059D12 is a heavy-duty rear big brake upgrade kit featuring 4-piston fixed calipers and 330x22mm (13.0" x 0.86") C-hook slotted, vented cast iron rotors. Engineered for demanding on- and off-road use, this kit delivers dramatically improved stopping power, reduced brake fade, and longer pad life over the factory brake system — all while retaining the stock master cylinder and OEM parking brake function.

Performance Gains Over Stock:

• Up to 14% reduction in disc temperature rise
• Up to 35% reduction in pad work rate
• Up to 6% increase in available brake torque
• Up to 10% reduction in pedal effort

Key Features:

• Ductile iron 4-piston fixed caliper housing for maximum strength, stiffness, and high resistance to impact and fatigue
• Epoxy acrylic paint over acid zinc finish for maximum corrosion protection — finished in high-temperature red epoxy
• High-friction brake pads increase stopping power and reduce pad temperatures
• Larger 330mm (13") vented slotted rotors increase brake torque and thermal capacity, reducing brake fade potential
• Increased pad area with machined reliefs to reduce temperatures and extend pad life
• High-temperature seal material sourced from motorsport-grade components
• Wiper seal on every piston for dirt and debris exclusion — critical for off-road use
• Compatible with stock OEM brake actuation — no master cylinder upgrade required
• Retains and utilizes OEM parking brake
• Fits many OEM 17" and larger aftermarket wheels (wheel clearance template available)
• Limited 1-year / 12,000-mile warranty on materials and workmanship

Kit Includes:

• Left Caliper: CIR5059D07HZLT-RL (1)
• Right Caliper: CIR5059D07HZRT-LL (1)
• Brake Pads: PNS4450X703 (4)
• Left Rotor: DIV3430X1023C24L (1)
• Right Rotor: DIV3430X1023C24R (1)
• Bracket Kit: BSK4450X565 (2)
• Banjo Bolts: BSH3430X1150 (2)
• All mounting hardware included

Specifications:

• Caliper Type: 4-Piston Fixed
• Caliper Color: Red
• Rotor Outside Diameter: 330mm (13.0")
• Rotor Thickness: 22mm (0.86")
• Rotor Style: C-Hook Slotted, Vented
• Rotor Construction: 1-Piece Cast Iron
• Piston Size: 34.9mm
• UPC: 854071008065

The Alcon BKR5059D12 rear brake kit completes Alcon's big brake package and is purpose-built for enthusiasts, overlanders, and off-road drivers who demand consistent, fade-free braking under the most challenging conditions.