Ksport BKAU122-435SO DualComp Rear Big Brake Kit Slotted Rotors - 4-Piston 13in

The Ksport DualComp Big Brake Kit is an all-in-one dual-function braking solution engineered for high-performance driving. Designed with drifting and rally racing in mind, this rear brake kit features an innovative single 4-piston caliper that serves double duty — two pistons dedicated to the foot brake and two pistons dedicated to the handbrake, each operating independently on its own hydraulic circuit.

The two-piece floating rotor design delivers fade-free stopping power on the track while remaining comfortable and predictable under everyday driving conditions. The lightweight center sections are crafted from 6061-T6 aircraft-grade aluminum, reducing rotational mass for sharper, more responsive braking. Because the outer rotor ring can expand and contract independently from the center hat, heat-induced warping is significantly reduced. The aluminum center section also acts as an effective heat sink, dissipating thermal energy away from the hub assembly faster than traditional one-piece rotors.

CNC-machined carbon steel caliper brackets allow the oversized calipers to bolt directly to the OEM caliper bracket location without requiring vehicle modifications. D.O.T.-compliant stainless-steel braided brake lines are included as standard equipment.

Key Features:

• Innovative 4-piston dual-function caliper — 2 pistons for foot brake, 2 pistons for handbrake, each on independent hydraulic circuits
• Rear-position big brake kit with 330mm (13 in.) slotted floating rotor
• Two-piece rotor design with 6061-T6 aircraft-grade aluminum center hat for reduced rotational mass
• Rotor can weigh up to 50% less than OEM rotors of the same size
• Polished titanium handbrake cylinder and lever included
• CNC-machined carbon steel caliper brackets for OEM bolt-on fitment
• D.O.T.-compliant stainless-steel braided brake lines included
• Formula Drift legal
• Compatible with 17-inch wheels and larger
• Designed for 2WD vehicles

What's Included:

• 4-Piston DualComp Caliper
• Floating Slotted Brake Disc (330mm / 13 in.)
• Brake Pads
• Polished Titanium Handbrake Cylinder and Lever
• CNC-Machined Carbon Steel Caliper Brackets
• Stainless-Steel Braided Brake Lines
• All Required Hardware

This is a complete bolt-on big brake kit designed for easy installation with minimal tools and no permanent vehicle modifications required in most applications.