Ksport BKAC040-434SO DualComp Rear Big Brake Kit 4-Piston 13 in. Slotted Rotors

The Ksport BKAC040-434SO DualComp Big Brake Kit is a complete rear brake upgrade engineered for performance driving disciplines including drifting and rally racing. This all-in-one dual caliper system features a single 4-piston caliper that handles both the foot brake and handbrake independently — two pistons dedicated to each function — eliminating the need for a separate handbrake caliper.

At the core of this kit is a two-piece floating brake disc with a 330mm (13 in.) slotted rotor surface paired to a 6061-T6 aircraft-grade aluminum center hat. The slotted rotor design promotes consistent pad bite and heat dissipation under race conditions, while the aluminum center section reduces rotational mass significantly compared to OEM one-piece rotors. Because the outer iron ring can expand and contract independently of the aluminum hat, rotor warping from heat buildup is greatly reduced.

Key Features:

• Single 4-piston DualComp caliper with independent foot brake and handbrake circuits
• Rotor diameter: 330mm / 13 in. — slotted rotor style
• Two-piece floating rotor design for fade-free, lightweight performance
• 6061-T6 aircraft-grade aluminum center hat for reduced rotational mass
• Formula Drift legal big brake kit
• Designed for 17-inch wheels and above
• Bolt-on installation — no vehicle modifications required in most applications
• Backed by a 12-month manufacturer defect warranty

What's Included:

• 4-Piston DualComp caliper(s)
• Floating slotted brake disc(s)
• Brake pads
• Handbrake hardware
• All required installation hardware

Important Notes: The OEM handbrake will not function with this kit installed — the DualComp system replaces OEM handbrake function entirely. Compatible with 2WD vehicles only unless otherwise specified. This product is built to order.