Ksport BKAU430-445SO DualComp Rear 4-Piston Big Brake Kit with 14 in. Slotted Rotors

The Ksport BKAU430-445SO DualComp Big Brake Kit is a complete rear big brake upgrade engineered for performance driving disciplines including drifting and rally racing. This innovative system features a single 4-piston caliper that serves dual purposes — two pistons dedicated to the foot brake and two pistons dedicated to the handbrake — with each circuit operating fully independent of the other on its own hydraulic system.

The DualComp kit ships as a comprehensive bolt-on solution requiring no permanent vehicle modifications in most applications, making it an accessible upgrade for serious performance builds. It is Formula Drift legal and is designed for use with 18-inch wheels and above.

Key Features:

• Rotor Diameter: 356 mm (14 in.) slotted floating brake disc
• Caliper Type: 4-piston dual-function — 2 pots for foot brake, 2 pots for handbrake, each on independent hydraulic circuits
• Two-piece rotor construction with 6061-T6 aircraft-grade aluminum center hat — commonly up to 50% lighter than OEM rotors of the same size
• Floating outer rotor ring allows independent thermal expansion, significantly reducing the risk of heat-induced warping
• Polished titanium handbrake cylinder and lever included for improved feel and precise handbrake control
• CNC machined carbon steel caliper brackets allow direct bolt-up to OEM caliper bracket mounting locations
• D.O.T.-compliant stainless steel braided brake lines included
• Formula Drift legal — tested and proven on competitive drift and rally circuits

Kit Includes:

• 4-piston DualComp caliper
• 14 in. slotted floating brake disc
• Brake pads
• Polished titanium handbrake cylinder and lever
• CNC machined carbon steel caliper brackets
• DOT-compliant stainless steel braided brake lines
• All required installation hardware

Note: Ksport Big Brake kits are built to order. Ksport Big Brake kits are designed for 2WD vehicles unless otherwise stated.