Ksport BKAU420-445CO DualComp Rear 4-Piston Big Brake Kit with 14 in. Drilled Rotors

The Ksport DualComp Big Brake Kit is a complete, bolt-on rear braking upgrade engineered for drivers who demand precise foot brake and handbrake performance from a single, unified caliper unit. Designed with drifting and rally racing in mind, this kit delivers competition-grade stopping power and handbrake response in one streamlined package.

Innovative Dual-Function 4-Piston Caliper:

• Single 4-piston caliper handles both braking functions — 2 pistons dedicated to the foot brake, 2 pistons dedicated to the handbrake
• Each braking circuit operates fully independently on its own hydraulic system
• Includes a polished titanium handbrake cylinder and lever for improved feel and precise directional control
• CNC-machined carbon steel caliper brackets allow the larger-than-OEM calipers to bolt directly to the OEM caliper bracket location

Lightweight Two-Piece Floating Rotor:

• 356mm (14 in.) cross-drilled floating rotor design for superior heat dissipation and fade-free performance
• Two-piece construction allows the outer rotor ring to expand and contract independently, greatly reducing warping risk under high heat
• Rotor center section crafted from 6061-T6 aircraft-grade aluminum — rotors commonly weigh up to 50% less than OEM equivalents of the same size
• Aluminum center sections act as effective heat sinks, channeling heat away from the braking surface to the air and hub assembly

Complete Kit — Everything Included:

• 4-piston DualComp calipers
• Two-piece cross-drilled floating brake disc
• Performance brake pads
• DOT-compliant stainless-steel braided brake lines
• Polished titanium handbrake cylinder and lever
• All required mounting hardware

Additional Highlights:

• Formula Drift legal big brake kit
• Suitable for 18-inch wheels and above
• Bolt-on installation — no vehicle modifications required in most applications
• Backed by a 12-month manufacturer defect warranty