Ksport BKAU420-445SO DualComp Rear Big Brake Kit Slotted Rotors - 4-Piston 14in

The Ksport DualComp Big Brake Kit is a complete rear brake upgrade engineered for high-performance driving, drifting, and rally racing applications. Built around a single 4-piston caliper, this innovative dual-function system dedicates 2 pistons to the foot brake circuit and 2 pistons to the handbrake circuit — each operating independently on its own hydraulic system for precise, reliable control in the most demanding conditions.

Key Features:

• Dual-function 4-piston caliper — integrates foot brake and handbrake into a single compact caliper body
• 14-inch (356mm) slotted floating brake disc — significantly larger than OEM for greater stopping force and improved heat dissipation
• Two-piece rotor construction — outer ring expands and contracts independently from the 6061-T6 aircraft-grade aluminum center hat, reducing warp risk and lowering rotational mass
• Polished titanium handbrake cylinder and lever included for precision handbrake feel and control
• CNC machined carbon steel caliper brackets — allow direct bolt-on installation to OEM caliper bracket locations
• D.O.T.-compliant stainless steel braided brake lines included as standard
• Formula Drift legal — tested and approved for competitive motorsport use
• Compatible with 18-inch wheels and larger
• Designed for 2WD vehicles

What's Included:

• 4-piston DualComp caliper(s)
• 14-inch slotted floating brake disc(s)
• 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

Installation is straightforward with minimal tools required and no permanent vehicle modifications needed in most applications. The two-piece rotor design commonly weighs up to 50% less than OEM rotors of the same size, reducing unsprung rotational mass for sharper brake response. The aluminum center section also acts as a heat sink, conducting thermal energy away from the rotor more efficiently than a conventional one-piece design.