Ksport BKBM040-435CO DualComp Rear Big Brake Kit 4-Piston 330mm Drilled Rotors

The Ksport BKBM040-435CO DualComp Big Brake Kit is a complete rear brake upgrade engineered for drivers who demand independent foot brake and handbrake control from a single, compact 4-piston caliper assembly. Designed with drifting and rally racing in mind, the DualComp system is equally at home on the street or the circuit.

Dual-Function 4-Piston Caliper Design:

• Single 4-pot caliper with 2 pistons dedicated to the foot brake and 2 pistons dedicated to the handbrake
• Each circuit operates fully independently on its own hydraulic system
• Formula Drift legal configuration
• Compatible with 17-inch wheels and larger

Two-Piece Floating Rotor:

• 330mm (13 in.) diameter cross-drilled rotor for superior heat dissipation
• 32mm rotor width for enhanced thermal capacity
• Two-piece floating design allows the outer ring to expand independently, dramatically reducing warp risk under high heat
• Rotor hat crafted from 6061-T6 aircraft-grade aluminum for reduced rotational mass — up to 50% lighter than comparable OEM one-piece rotors
• Aluminum center sections act as heat sinks, channeling heat away from the rotor face faster

Premium Hardware & Components:

• CNC machined carbon steel caliper brackets allow the oversized caliper to bolt directly to OEM bracket mounting locations — no chassis modifications required
• Polished titanium handbrake cylinder and lever included for precise e-brake engagement and improved feel
• D.O.T.-compliant stainless steel braided brake lines standard in the kit
• SC1 street brake pads included
• Available in cross-drilled or slotted rotor styles

What's Included:

• 4-Piston rear calipers
• Two-piece floating brake disc (330mm drilled)
• SC1 street brake pads
• Polished titanium handbrake assembly
• CNC caliper brackets
• Stainless steel braided brake lines
• All required mounting hardware

The Ksport DualComp Big Brake Kit installs with minimal tools and requires no vehicle modifications in most applications. A 12-month warranty covering manufacturer defects is included standard with every kit.