Ksport BKVW041-434CO DualComp Rear 4-Piston Big Brake Kit with 13 in. Drilled Rotors

The Ksport DualComp Big Brake Kit is a precision-engineered, all-in-one dual caliper braking solution purpose-built for drifting and rally racing applications. The system's innovative design integrates a single 4-piston caliper that serves two independent functions: 2 pistons dedicated to the foot brake and 2 pistons dedicated to the handbrake, each operating on its own fully independent hydraulic circuit for precise, reliable control in high-demand driving situations. This kit is Formula Drift legal.

Lightweight Forged One-Piece Caliper

The DualComp calipers are forged from a solid billet of aerospace-grade aluminum — not cast or welded — delivering perfectly uniform wall thickness and strength throughout the caliper body. Aluminum pistons are protected by heavy-duty, high-temperature seals engineered to withstand racetrack heat cycles. An opposed-piston design ensures consistent brake pad contact and even wear on both sides of the rotor.

Two-Piece Floating Rotor Design

All DualComp systems feature two-piece floating rotors that can weigh up to 50% less than OEM rotors of the same diameter. Center bells are crafted from 6061-T6 aircraft-grade aluminum, reducing unsprung rotational mass for quicker brake response. The floating outer ring expands and contracts independently from the center bell, dramatically reducing the risk of heat-induced warping.

What's Included:

• 4-Piston DualComp Calipers (foot brake + handbrake, independent circuits)
• 13 in. (330mm) Cross-Drilled Floating Brake Disc
• Brake Pads
• Polished Titanium Handbrake Cylinder and Lever
• CNC Machined Carbon Steel Caliper Brackets
• D.O.T.-Compliant Stainless-Steel Braided Brake Lines
• Titanium Brake Pad Retainer Clips
• Stainless-Steel Brake Pad Wear Plates
• All Required Hardware

Key Specifications:

• Caliper Type: 4-Piston (Dual-Function)
• Rotor Diameter: 330mm / 13 in.
• Rotor Style: Cross-Drilled
• Position: Rear
• Warranty: 12 months covering manufacturer defects

Designed for easy bolt-on installation with minimal tools and no vehicle modifications required in most applications. Note: The OEM handbrake will not function with this system installed — the kit's integrated handbrake circuit replaces OEM functionality.