Ksport BKMZ180-435SO DualComp Rear 4-Piston Big Brake Kit with 13 in. Slotted Rotors

The Ksport BKMZ180-435SO DualComp Big Brake Kit is a complete rear brake upgrade engineered specifically for performance driving applications including drifting and rally racing. This kit features Ksport's innovative dual-function caliper design, allowing a single 4-piston caliper to serve both the foot brake and handbrake simultaneously — each circuit operating fully independent on its own hydraulic system.

Key Features:

• Dual-function 4-piston caliper: 2 pistons dedicated to the foot brake, 2 pistons dedicated to the handbrake — fully independent systems in a single caliper body
• 13-inch (330mm) two-piece slotted floating rotor: Lightweight design commonly weighing up to 50% less than OEM rotors of the same size
• 6061-T6 aircraft-grade aluminum rotor center bells: Reduces rotational mass for quicker braking response and improved wheel deceleration
• Polished titanium handbrake cylinder and lever: Enhances handbrake feel and precision control during aggressive driving maneuvers
• CNC machined carbon steel caliper brackets: Engineered to mount directly to the OEM caliper bracket location without vehicle modification
• D.O.T.-compliant stainless-steel braided brake lines: Eliminates hose expansion under pressure for a firmer, more responsive pedal feel
• Formula Drift legal: Approved for competition use; compatible with 17-inch wheels and larger
• Slotted rotor style: Recommended for track and performance driving applications for maximum bite and fade resistance

What's Included:

• 4-piston DualComp caliper(s)
• 13 in. two-piece floating slotted brake disc(s)
• Performance brake pads
• Polished titanium handbrake cylinder and lever
• CNC machined carbon steel caliper brackets
• D.O.T.-compliant stainless-steel braided brake lines
• All required installation hardware

The independent floating rotor design allows the outer ring to expand and contract separately from the aluminum center bell, significantly reducing the risk of warping under sustained heat buildup. The aluminum center sections also act as effective heat sinks, channeling thermal energy away from the rotor and toward the hub assembly for consistent, fade-free performance. This big brake kit is built to order and is covered by Ksport's standard 12-month manufacturer defect warranty.