Ksport BKBM031-435CO DualComp Rear 4-Piston Big Brake Kit with 13 in. Floating Rotor

The Ksport BKBM031-435CO DualComp Big Brake Kit is a complete, race-engineered dual-function brake upgrade designed for drivers who demand precise foot brake and handbrake control from a single caliper assembly. Engineered with drifting and rally racing applications in mind, this kit delivers serious stopping power in a clean, bolt-on package.

Dual-Function 4-Piston Caliper System:

• Single 4-piston caliper handles two independent braking functions — 2 pistons dedicated to the foot brake circuit, 2 pistons dedicated to the handbrake circuit
• Both circuits operate fully independently on their own hydraulic systems, eliminating cross-interference
• Includes a polished titanium handbrake cylinder and lever for precision control and enhanced driver feel

Two-Piece Floating Rotor Design:

• Rotor diameter: 330 mm (13 in.)
• Lightweight two-piece construction commonly weighs up to 50% less than OEM rotors of equivalent size
• 6061-T6 aircraft-grade aluminum center hat reduces unsprung rotational mass for sharper brake response
• Floating outer ring expands and contracts independently from the center, dramatically reducing heat-related warping
• Aluminum center section acts as a heat sink, dissipating thermal energy away from the hub assembly
• Available in cross-drilled or slotted rotor styles — drilled recommended for street/daily use, slotted recommended for track use

Construction & Hardware:

• CNC-machined carbon steel caliper brackets allow the oversized calipers to mount directly to the factory caliper bracket location — no modifications required
• D.O.T.-compliant stainless steel braided brake lines included standard
• Appropriate for 17-inch wheels and above
• Formula Drift legal

Complete Kit Includes:

• 4-Piston DualComp calipers
• Floating brake disc (rotor)
• Performance brake pads
• Polished titanium handbrake cylinder and lever
• CNC-machined caliper brackets
• D.O.T.-compliant stainless steel braided brake lines
• All required installation hardware

The Ksport DualComp system installs with minimal tools and requires no permanent vehicle modifications in most applications, making it one of the most accessible big brake upgrades available for performance and motorsport use. Backed by a 12-month manufacturer's warranty covering defects.