Ksport BKSB170-621CO Procomp Big Brake Kit Floating Rotor Piston Caliper - 4 6 or 8

The Ksport BKSB170-621CO Procomp Big Brake Kit is a sophisticated bolt-on brake upgrade engineered to deliver superior stopping power and dramatically reduce brake fade under sustained high-heat conditions. Designed for straightforward installation with minimal tools required, this kit requires no vehicle modifications in most applications.

Aircraft-Grade Billet Aluminum Calipers

Each caliper is CNC machined from a single block of aircraft-grade billet aluminum — not cast or welded — providing perfectly uniform wall thickness and strength throughout the caliper body. This one-piece construction eliminates weak points that lead to fracturing or warpage over time. At just over 5 lbs. each, these calipers offer significant weight savings over OEM units. The differential bore, opposed-piston caliper design improves pad wear evenness and caliper rigidity compared to stock configurations. Machined-in protection grooves for the bridge tubes, aluminum pistons, high-temperature seals, and stainless-steel brake pad wear plates are all standard on every caliper.

Two-Piece Floating Rotor Design

The 2-piece floating disc assembly reduces both rotating and unsprung weight for improved response. The floating outer rotor section is designed to shift slightly as needed, allowing for better self-centering within the caliper. This lowers brake drag, promotes more even pad application, and — critically — prevents thermal stresses from warping the disc or cupping the braking surface under extreme heat. Every rotor is heat treated and balanced prior to shipment to ensure consistent, high-performance results.

DOT-Compliant Stainless-Steel Braided Brake Lines

Stainless-steel braided brake lines are included and eliminate hose expansion under pressure, delivering a firmer, more responsive pedal feel compared to stock rubber lines.

Rotor Style Options

• Cross Drilled: Runs cooler and is recommended for daily driven street vehicles
• Slotted: Features a unique slot design that reduces braking noise and expels gas and pad debris faster than conventional slot patterns; recommended for track-focused use

Caliper Options:

• Available in 4, 6, or 8 piston configurations to match your braking requirements
• Calipers available in painted finishes (Orange, Red, Black, Yellow) or upgradeable to premium polished or anodized colors

Key Specifications:

• Caliper Construction: 1-piece CNC machined aircraft-grade billet aluminum
• Caliper Weight: Just over 5 lbs. each
• Pistons: Aluminum, opposed-piston design
• Rotor Design: 2-piece floating disc assembly
• Brake Lines: D.O.T.-compliant stainless-steel braided
• Piston Options: 4, 6, or 8 piston
• Rotor Style: Cross Drilled or Slotted
• Warranty: 12-month manufacturer defect coverage

All Ksport Big Brake Kits are built to order. OEM ABS systems remain fully functional with this brake kit installed.