Ksport BKVW051-445SO DualComp Rear 4-Piston Big Brake Kit with 14 in. Slotted Rotors

The Ksport BKVW051-445SO DualComp Big Brake Kit is a complete rear brake upgrade engineered for high-performance driving, drifting, and rally racing applications. The DualComp system's defining feature is its innovative single 4-piston caliper design — 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. This dual-function architecture provides exceptional braking control and precise handbrake engagement without compromise.

Featuring a 356mm (14 in.) slotted floating brake disc, this kit delivers improved heat dissipation and consistent fade-free stopping power whether on track or street. The two-piece rotor construction uses a lightweight 6061-T6 aircraft-grade aluminum center hat, which significantly reduces rotational mass and allows the outer rotor ring to expand and contract independently — dramatically reducing the risk of warping under high heat conditions. The aluminum center section also acts as an effective heat sink, transferring thermal energy away from the rotor and hub assembly quickly.

Key Features:

• Single 4-piston rear caliper with dual-circuit design: 2 pistons for foot brake, 2 pistons for handbrake
• 356mm (14 in.) slotted floating brake disc for superior heat management and bite
• Two-piece rotor with 6061-T6 aircraft-grade aluminum center — up to 50% lighter than OEM rotors
• Polished titanium handbrake cylinder and lever included
• CNC-machined carbon steel caliper brackets for direct bolt-on fitment to OEM bracket locations
• D.O.T.-compliant stainless-steel braided brake lines included
• Formula Drift legal configuration
• Compatible with 18-inch wheels and larger
• Minimal tools required — no vehicle modifications needed in most applications

What's Included:

• 4-piston rear calipers
• 356mm slotted floating brake disc
• Performance brake pads
• Polished titanium handbrake cylinder and lever
• Stainless-steel braided brake lines (D.O.T. compliant)
• CNC-machined carbon steel caliper brackets
• All required installation hardware

The DualComp Big Brake Kit is a fully integrated, bolt-on solution designed for drivers who demand both foot-brake and handbrake performance from a single, compact rear caliper assembly. Tested and proven on drift circuits and rally stages, this kit is built to order by Ksport at their ISO 9001-certified manufacturing facility.