Ksport BKAU400-445SO DualComp Rear Big Brake Kit Slotted Rotors - 4-Piston 14in

The Ksport DualComp Big Brake Kit is a complete rear brake upgrade engineered for high-performance driving applications including drifting and rally racing. Built around an innovative dual-function design, this kit delivers both foot brake and handbrake capability through a single, compact 4-piston caliper — no extra hardware required.

The DualComp system splits the 4-piston caliper into two independent circuits: 2 pistons dedicated to the foot brake and 2 pistons dedicated to the handbrake, each running on its own fully independent hydraulic system. This allows precise, simultaneous control of both braking functions without interference between the two.

Key Features:

• Rotor Diameter: 356mm (14 in.) slotted, two-piece floating design
• Caliper Type: 4-piston rear caliper with dual-circuit functionality
• Rotor Construction: Lightweight two-piece floating rotor with 6061-T6 aircraft-grade aluminum center hat — up to 50% lighter than OEM rotors of equivalent size
• Caliper Brackets: CNC machined carbon steel brackets for direct bolt-on fitment to OEM mounting locations
• Handbrake Hardware: Polished titanium handbrake cylinder and lever included
• Brake Lines: D.O.T. compliant stainless steel braided brake lines included
• Formula Drift Legal: Approved for competition use
• Minimum Wheel Size: 18 inches and above

What's Included:

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

The two-piece floating rotor design allows the outer ring to expand and contract independently from the aluminum center hat, significantly reducing the risk of heat-induced warping. The aluminum center section also acts as an efficient heat sink, dissipating thermal energy away from the rotor and hub assembly faster than traditional OEM one-piece designs. Installation requires minimal tools and no permanent vehicle modifications in most applications.