Ksport BKAU320-444SO DualComp Rear 4-Piston Big Brake Kit with Slotted Floating Rotor

The Ksport BKAU320-444SO DualComp Big Brake Kit is a complete, all-in-one dual-function braking solution engineered for high-performance driving, drifting, and rally racing applications. This rear big brake kit replaces your factory braking components with a purpose-built system that handles both foot brake and handbrake duties through a single, compact 4-piston caliper.

At the heart of the DualComp system is an innovative single 4-pot caliper design: two pistons are dedicated to the hydraulic foot brake circuit, while the remaining two pistons operate the handbrake — each running on its own fully independent hydraulic system. This dual-circuit architecture delivers precise, consistent braking control whether on the street or the track.

Key Features:

• 4-Piston Dual-Function Caliper — 2 pistons for the foot brake, 2 pistons for the handbrake, each on independent hydraulic circuits
• Lightweight Two-Piece Floating Rotor — Commonly up to 50% lighter than OEM rotors of equivalent size; designed to resist warping by allowing the outer ring to expand and contract independently of the 6061-T6 aircraft-grade aluminum center hat
• Slotted Rotor Style — Optimized for track and spirited driving to maximize pad bite and heat dissipation
• CNC Machined Carbon Steel Caliper Brackets — Precisely engineered to bolt directly to the OEM caliper bracket location with no vehicle modifications required
• Polished Titanium Handbrake Cylinder and Lever — Enhances feel, aesthetics, and handbrake control
• D.O.T. Compliant Stainless-Steel Braided Brake Lines — Included as standard for improved pedal feel and durability
• Formula Drift Legal — Tested and proven on professional drift and rally circuits
• 12-Month Warranty — Covers manufacturer defects

What's Included:

• 4-Piston DualComp Caliper(s)
• Two-Piece Floating Slotted Brake Disc
• Performance Brake Pads
• Polished Titanium Handbrake Cylinder and Lever
• CNC Machined Carbon Steel Caliper Bracket(s)
• D.O.T. Compliant Stainless-Steel Braided Brake Lines
• All Required Hardware

The DualComp system is engineered for easy, bolt-on installation with minimal tools required and no permanent vehicle modifications in most applications. Note: the OEM factory handbrake will not function once this kit is installed, as the DualComp handbrake replaces it entirely.