Wilwood 120-13268 FSL6R-ST Left Hand 6-Piston Radial Mount Brake Caliper

The Wilwood FSL6R-ST caliper delivers professional-grade braking performance with advanced heat management and differential bore piston technology. Designed for sustained hard braking in oval track, road course, rally, and off-road applications, this left-hand caliper features Thermlock® pistons for ultimate thermal protection under extreme conditions.

Key Features:

• Six-piston differential bore design for optimized pad wear and consistent braking performance
• Thermlock® pistons provide superior heat insulation to protect brake fluid from boiling
• Internal fluid ports eliminate external crossover tubes for cleaner installation and reduced failure points
• Dual bleed screw assemblies for easier bleeding and left/right hand orientation without leading/trailing configuration
• Type III hard anodized finish for maximum corrosion resistance and durability
• Stress-flow forged from premium aluminum alloy billet for exceptional strength
• Advanced body design with closed end bridges and radial transitions increases strength and reduces deflection under load
• Lightweight construction at approximately 4.4 pounds assembled weight
• Radial mount configuration for modern big brake applications

The FSL6R body design utilizes computer-generated solid modeling and stress analysis technology to optimize strength-to-weight ratio. The forged aluminum construction with closed end bridges and smooth radial transitions eliminates stress concentrations in critical areas, providing measurable improvements in body rigidity and resistance to deflection during high-load braking events.