Ksport BKMZ300-444CO DualComp Rear 4-Piston Big Brake Kit with 14 in. Drilled Rotors

The Ksport BKMZ300-444CO DualComp Big Brake Kit is a complete rear big brake upgrade engineered for high-performance driving, drifting, and rally racing applications. This unique dual-function system integrates both foot brake and handbrake capability into a single compact 4-piston caliper — eliminating the need for a separate handbrake caliper while delivering exceptional stopping power.

Innovative Dual-Function 4-Piston Caliper Design:

• Single 4-pot caliper handles both foot brake (2 pistons) and handbrake (2 pistons), each operating independently on its own hydraulic circuit
• 14-inch (356mm) cross-drilled floating rotor for maximum heat dissipation and fade resistance under sustained high-load braking
• Two-piece rotor construction with a 6061-T6 aircraft-grade aluminum center hat — up to 50% lighter than OEM solid rotors of equivalent size
• Aluminum center sections act as heat sinks, channeling thermal energy away from the braking surface to the hub assembly and ambient air
• Independent outer rotor ring allows thermal expansion without warping the full rotor assembly
• Formula Drift legal big brake kit — race-proven on drift and rally circuits
• Complete bolt-on installation with CNC-machined carbon steel caliper brackets that align to OEM caliper mounting locations — no permanent vehicle modifications required
• NAOC ceramic brake pads included — optimized for street and occasional track use, producing up to 50% less brake dust than race compounds

Kit Includes:

• 4-Piston DualComp Caliper(s)
• 14 in. (356mm) Cross-Drilled Floating Brake Disc
• NAOC Ceramic Brake Pads
• Handbrake hardware
• All required mounting hardware and brackets

Specifications:

• Rotor Diameter: 356mm / 14 in.
• Rotor Style: Cross-Drilled
• Caliper Type: 4-Piston DualComp
• Caliper Color: Orange
• Position: Rear

Important Notes: The OEM handbrake will NOT function once this kit is installed — the DualComp caliper's integrated handbrake circuit replaces it entirely. Compatible with 18-inch wheels and larger. This kit fits 2WD vehicles only unless otherwise specified.