Ksport BKNS230-435SO DualComp Rear Big Brake Kit 4-Piston Caliper with 13 in. Slotted Rotor

The Ksport BKNS230-435SO DualComp Big Brake Kit is a complete, all-in-one rear brake upgrade engineered for drivers who demand independent foot brake and handbrake control from a single caliper assembly. Designed with drifting and rally racing in mind, this kit delivers serious stopping power and precise handbrake response in one clean, bolt-on package.

Dual-Function 4-Piston Caliper Design:

At the heart of the DualComp system is a single 4-piston caliper that splits its function between two dedicated circuits: two pistons dedicated to the hydraulic foot brake and two pistons dedicated to the handbrake. Each circuit operates fully independently on its own hydraulic system, providing clean, reliable engagement without cross-interference — a critical advantage for competitive drifting and circuit driving.

Lightweight Two-Piece Floating Rotor:

The kit includes a 13-inch (330mm) slotted, two-piece floating brake disc. The rotor's outer ring can expand and contract independently from the center hat section, significantly reducing the risk of warping under hard, repeated use. The center hat is crafted from 6061-T6 aircraft-grade aluminum, which reduces rotational mass compared to OEM one-piece rotors and acts as an effective heat sink to transfer thermal energy away from the braking surface. Slotted rotor venting makes this configuration ideal for track and competition use.

Key Features:

• 4-Piston dual-function caliper — 2 pistons for foot brake, 2 pistons for handbrake, each on independent hydraulic circuits
• 13 in. (330mm) slotted two-piece floating rotor for fade resistance and lightweight performance
• 6061-T6 aircraft-grade aluminum rotor center hat for reduced rotational mass
• Two-piece rotor design weighs up to 50% less than OEM rotors of equivalent size
• Complete bolt-on installation — no permanent vehicle modifications required in most applications
• Minimal tools required for installation
• Formula Drift legal big brake kit
• Backed by a 12-month warranty covering manufacturer defects

What's Included:

• 4-Piston DualComp caliper(s)
• 13 in. slotted floating brake disc(s)
• Performance brake pads
• Handbrake hardware
• All required mounting hardware

The Ksport DualComp Big Brake Kit is a proven solution for rally racing and drift circuits, offering a sophisticated performance brake upgrade that installs with minimal effort and no vehicle modifications required in most applications.