Wilwood 120-13233 Superlite Forged Brake Caliper - FSL4R

The Wilwood Superlite FSL4R is a forged narrow-mount four-piston brake caliper engineered for professional racing applications. This caliper has become the benchmark standard in asphalt short track, late model, modified, and open wheel competition, while also excelling in road racing, rally, and high-performance street applications.

Key Features:

• Stress-flow forged from premium grade aluminum alloy billet for maximum strength
• Internal fluid ports eliminate external crossover tubes for cleaner installation
• Lightweight design at just 4.4 pounds assembled weight
• Closed-end bridges with radial transitions reduce stress concentration points
• Computer-generated solid modeling optimizes strength-to-weight ratio
• Enhanced resistance to deflection under high brake loads
• Four-piston design provides balanced clamping force

The FSL4R caliper body utilizes advanced engineering to eliminate machined steps and sharp shoulders in critical stress areas, resulting in measurably improved body strength and rigidity. The forged construction process ensures consistent material properties and superior performance under the extreme demands of competitive motorsports.