Ksport BKMZ330-445CO 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 high-performance driving. Designed with drifting and rally racing in mind, this kit features an innovative dual-function 4-piston caliper that integrates both the foot brake and handbrake into a single unit — with 2 pistons dedicated to each system, each operating independently on its own hydraulic circuit.

The two-piece floating rotor measures 356mm (14 inches) in diameter and features a drilled rotor face for improved heat dissipation and fade resistance. The lightweight rotor center section is crafted from 6061-T6 aircraft-grade aluminum, reducing rotational mass by up to 50% compared to OEM one-piece rotors of the same size. Because the outer ring can expand and contract independently from the center, heat-induced warping is significantly reduced.

The forged one-piece calipers are machined from aerospace-grade aluminum billet for uniform wall thickness and maximum strength, eliminating weak points that can lead to cracking or failure. Aluminum caliper pistons are protected by heavy-duty high-temperature seals, and an opposed-piston design ensures even pad contact and wear on both sides of the rotor. Stainless-steel braided brake lines (DOT compliant), titanium brake pad retainer clips, and stainless-steel brake pad wear plates are all included as standard.

The DualComp system also includes a polished titanium handbrake cylinder and lever for improved ergonomics and precise handbrake modulation. CNC-machined carbon steel caliper brackets allow the oversized calipers to bolt directly to the OEM bracket mounting location with no chassis modifications required in most applications.

Kit Includes:

• 4-piston DualComp caliper (foot brake + handbrake integrated)
• Two-piece floating drilled brake disc — 356mm / 14 in. diameter
• Performance brake pads
• Polished titanium handbrake cylinder and lever
• DOT-compliant stainless-steel braided brake lines
• CNC-machined carbon steel caliper brackets
• High-temperature seals, titanium retainer clips, and stainless-steel wear plates
• All required installation hardware

Key Specifications:

• Rotor Diameter: 356mm / 14 in.
• Caliper Type: 4-Piston (Dual-Function)
• Rotor Style: Drilled, Two-Piece Floating
• Rotor Center Material: 6061-T6 Aircraft-Grade Aluminum
• Position: Rear
• Formula Drift Legal: Yes
• Minimum Wheel Size: 18 in.
• Fitment: 2WD vehicles only

The Ksport DualComp is a race-proven big brake kit that delivers competition-grade stopping power and handbrake precision in a clean, bolt-on package — equally at home on the drift circuit or the rally stage.