Ksport BKAU031-435CO DualComp Rear 4-Piston Big Brake Kit with 13 in. Drilled Rotors

The Ksport BKAU031-435CO DualComp Big Brake Kit is a complete rear brake upgrade engineered for drivers who demand independent foot brake and handbrake control from a single caliper assembly. Designed with drifting and rally racing in mind, this big brake kit delivers competition-proven stopping power in a clean, bolt-on package.

Dual-Function 4-Piston Caliper System:

• Single 4-piston caliper with 2 pistons dedicated to the foot brake and 2 pistons dedicated to the handbrake
• Each circuit operates fully independently on its own hydraulic system
• Includes a polished titanium handbrake cylinder and lever for precise e-brake modulation and improved driving control
• Formula Drift legal — tested and approved for competitive use on drift and rally circuits

Two-Piece Floating Rotor Design:

• 330mm (13 in.) cross-drilled floating brake disc for improved heat dissipation and fade resistance
• Two-piece rotor construction allows the outer ring to expand and contract independently, significantly reducing the risk of warping under heat buildup
• Lightweight 6061-T6 aircraft-grade aluminum center section reduces rotational mass for quicker, more responsive braking
• Rotors commonly weigh up to 50% less than OEM one-piece rotors of equivalent size

Hardware & Installation:

• CNC-machined carbon steel caliper brackets allow the oversized calipers to bolt directly to the factory caliper bracket location — no vehicle modifications required in most applications
• D.O.T.-compliant stainless-steel braided brake lines included as standard
• Minimal tools required for installation

What's Included:

• 4-piston calipers
• Floating cross-drilled brake disc (330mm / 13 in.)
• Performance brake pads
• Polished titanium handbrake cylinder and lever
• CNC-machined caliper brackets
• Stainless-steel braided brake lines
• All required hardware

The Ksport DualComp Big Brake Kit comes backed by a 12-month manufacturer's warranty covering defects in materials and workmanship. Available in cross-drilled or slotted rotor styles — cross-drilled rotors are recommended for street and dual-use applications, while slotted rotors are preferred for dedicated track use.