Ksport BKBM031-445CO DualComp Rear 4-Piston Big Brake Kit with 14 in. Drilled Rotors

The Ksport DualComp Big Brake Kit is a complete, all-in-one dual-function braking solution engineered for high-performance driving. Designed with drifting and rally racing in mind, this rear big brake kit features a single 4-piston caliper where 2 pistons are dedicated to the foot brake and 2 pistons are dedicated to the handbrake — each operating independently on its own hydraulic circuit for precise, fail-safe braking control.

The DualComp system includes a polished titanium handbrake cylinder and lever, which not only enhances the appearance of the handbrake assembly but also improves control and driver feel during aggressive maneuvers. CNC-machined carbon steel caliper brackets allow the oversized calipers to bolt directly to your OEM caliper bracket location without requiring vehicle modifications.

Lightweight Forged One-Piece Calipers:

The DualComp calipers are forged from a single billet of aerospace-grade aluminum — not cast or welded — delivering consistent wall thickness and eliminating weak points that can lead to fracturing or warping under high heat. Aluminum pistons are protected by heavy-duty high-temperature seals, and an opposed-piston design ensures even brake pad contact and uniform wear on both sides of the rotor. Titanium brake pad retainer clips and stainless-steel brake pad wear plates are included as standard.

Two-Piece Floating Rotor Design:

All DualComp systems ship with two-piece floating rotors featuring a 6061-T6 aircraft-grade aluminum center bell and a drilled outer ring. These rotors can weigh up to 50% less than OEM rotors of the same diameter, reducing unsprung and rotational mass for sharper brake response. The floating design allows the outer ring to expand and contract independently, significantly reducing the risk of heat-induced warping. Aluminum center sections also act as heat sinks, dissipating thermal energy away from the hub assembly more efficiently than steel.

Key Features:

• 4-piston caliper with independent foot brake and handbrake circuits (2 pots each)
• Forged one-piece aerospace-grade aluminum caliper construction
• Polished titanium handbrake cylinder and lever included
• CNC-machined carbon steel caliper brackets for OEM-location bolt-on fitment
• 14 in. (356 mm) two-piece floating drilled rotor
• 6061-T6 aluminum center bell — up to 50% lighter than OEM rotors
• Aluminum pistons with high-temperature seals and opposed-piston design
• Titanium brake pad retainer clips and stainless-steel wear plates
• D.O.T.-compliant stainless-steel braided brake lines included
• Formula Drift legal
• Complete bolt-on kit — no vehicle modifications required in most applications

What's Included: 4-Piston DualComp Caliper, Floating Brake Disc, Brake Pads, Titanium Handbrake Assembly, Caliper Brackets, Stainless-Steel Braided Brake Lines, and all required installation hardware.

Rotor Diameter: 356 mm / 14 in. | Caliper Type: 4-Piston | Rotor Style: Drilled | Position: Rear