Ksport BKBM320-445SO DualComp Rear 4-Piston Big Brake Kit with 14 in. Slotted Rotors

The Ksport BKBM320-445SO DualComp Big Brake Kit is an all-in-one dual-function rear brake upgrade engineered for performance driving. Designed with drifting and rally racing in mind, the DualComp system features a single 4-piston caliper that splits braking duties across two independent circuits — two pistons dedicated to the foot brake and two pistons dedicated to the handbrake — each operating entirely independently on its own hydraulic system.

Key Features:

• 4-Piston Dual-Circuit Caliper: Two pots serve the foot brake; two pots serve the handbrake — each on a fully independent hydraulic circuit
• 14-Inch Two-Piece Slotted Floating Rotor: 356mm diameter slotted rotor delivers fade-free performance; two-piece construction can weigh up to 50% less than OEM equivalent rotors
• 6061-T6 Aircraft-Grade Aluminum Rotor Hat: Lightweight aluminum center section reduces rotational mass for quicker brake response and acts as a heat sink to dissipate thermal buildup
• Polished Titanium Handbrake Cylinder and Lever: Included with the kit for precise handbrake feel and control
• CNC-Machined Carbon Steel Caliper Brackets: Engineered to mount the oversized calipers directly to the OEM caliper bracket location — no chassis modifications required
• D.O.T.-Compliant Stainless Steel Braided Brake Lines: Included standard for reliable, high-pressure fluid transfer
• SC1 Street Brake Pads Included: Ready to install right out of the box
• Formula Drift Legal: Approved for sanctioned competition use
• 12-Month Manufacturer Warranty: Covers manufacturer defects

Kit Includes: 4-piston DualComp caliper, two-piece floating slotted brake disc (356mm / 14 in.), SC1 street brake pads, polished titanium handbrake cylinder and lever, CNC-machined caliper brackets, stainless steel braided brake lines, and all required mounting hardware.

Specifications:

• Rotor Diameter: 356 mm / 14 in.
• Rotor Style: Slotted
• Rotor Type: Two-Piece Floating
• Caliper Type: 4-Piston (DualComp)
• Position: Rear

The Ksport DualComp system installs with minimal tools and requires no permanent vehicle modifications in most applications. Kits are built to order — please allow 4–6 weeks for production and delivery.