Ksport BKSB091-621SO Floating Rotor Big Brake Kit | 4, 6, or 8 Piston Caliper

The Ksport BKSB091-621SO is a high-performance floating rotor big brake kit engineered to deliver maximum stopping power with reduced brake fade. Available with 4, 6, or 8 piston caliper configurations, this system is built for drivers who demand superior braking performance on both the street and track.

Ksport's 2-piece floating disc assembly is a standout feature — the floating design isolates thermal stress caused by extreme heat, preventing disc warping and braking surface cupping that are common with conventional solid rotor designs. Every rotor is heat treated and balanced prior to shipment to ensure precise, consistent performance right out of the box.

The proprietary slot design on the rotor rapidly expels gas and pad debris while significantly reducing braking noise compared to conventional slotted designs. The floating rotor also reduces both rotating and unsprung weight, contributing to improved handling dynamics.

Caliper Features:

• CNC machined from aircraft-quality billet aluminum for exceptional strength and light weight
• Differential bore, opposed piston design for improved pad wear and caliper rigidity over OEM
• Weighs just over 5 lbs. each — optimized for minimal unsprung weight
• Machined-in bridge tube protection grooves for added durability
• Aluminum pistons with high-temperature seals for reliable performance under extreme conditions
• Stainless-steel brake pad wear plates standard on every caliper
• Stainless-steel brake lines resist expansion under pressure for consistent pedal feel

Rotor Design Notes:

• Slotted rotors are recommended for track-focused or high-performance driving applications
• Cross-drilled rotors tend to run cooler and are better suited for daily-driven vehicles

Designed for straightforward installation with minimal tooling required in most applications, the Ksport big brake kit is a complete, professional-grade braking upgrade for performance-oriented vehicles.