Ksport BKMZ300-434CO DualComp Rear 4-Piston Big Brake Kit with 13 in. Drilled Rotors

The Ksport BKMZ300-434CO DualComp Big Brake Kit is a complete rear brake upgrade engineered for high-performance driving. Designed with drifting and rally racing in mind, this kit delivers an innovative dual-function braking solution in a single, compact 4-piston caliper package.

Dual-Function 4-Piston Caliper System:

At the heart of the DualComp system is a single 4-pot caliper that serves two independent purposes — two pistons are dedicated to the foot brake circuit while the remaining two pistons are dedicated to the handbrake circuit. Each circuit operates completely independently on its own hydraulic system, providing precise, isolated control for both foot and hand braking — ideal for drift and motorsport applications.

Key Features:

• Caliper Type: 4-Piston (2-pot foot brake / 2-pot handbrake)
• Rotor Diameter: 330mm (13 in.) — Cross Drilled
• Position: Rear
• Two-Piece Floating Brake Disc — lightweight design commonly up to 50% lighter than OEM rotors of the same size
• 6061-T6 Aircraft-Grade Aluminum rotor center bells reduce rotational mass for sharper, more responsive braking
• Independent rotor sections allow thermal expansion without full-rotor warping
• Cross-drilled rotor style recommended for street and dual-use applications for cooler running temperatures
• Formula Drift legal configuration
• Designed for 17-inch wheels and larger

Complete Bolt-On Kit — Everything Included:

• 4-Piston DualComp Calipers
• Floating Brake Disc (Cross Drilled)
• Brake Pads
• Handbrake hardware
• All required installation hardware

Important Notes:

• The OEM handbrake will not function with this kit installed — the DualComp handbrake system replaces OEM functionality
• Fits 2WD vehicles only unless otherwise stated
• Minimal tools needed; no major vehicle modifications required in most applications

The Ksport DualComp Big Brake Kit is the go-to rear brake solution for drivers who demand precision braking control on the track or drift circuit, backed by a 12-month manufacturer's warranty covering defects.