Wilwood 120-13230 Superlite FSL4R Four-Piston Brake Caliper

The Wilwood 120-13230 Superlite FSL4R is a high-performance four-piston disc brake caliper engineered for demanding racing applications including asphalt short track, late model, modified, open wheel competition, road racing, rally, and sport driving. This forged caliper represents the latest evolution in Wilwood's renowned Superlite 4R series, featuring an advanced internal fluid port design that eliminates the need for external fluid cross-over tubes for a cleaner, more reliable installation.

Key Features:

• Lightweight forged aluminum construction with assembled weight of just 4.4 pounds
• Internal fluid ports eliminate external cross-over tubes for improved reliability
• Stress-flow forged from premium grade aluminum alloy billet for maximum strength
• Computer-generated solid modeling and stress analysis optimized design
• Closed-end bridge design with radial transitions provides superior strength and deflection resistance
• Four-piston configuration delivers consistent, powerful braking performance
• Proven in professional racing across multiple motorsport disciplines

The FSL4R caliper body features an engineered design that eliminates machined steps and sharp shoulders in critical stress areas, providing measurably increased body strength and resistance to deflection under extreme braking loads. This combination of lightweight construction and exceptional rigidity makes the Wilwood 120-13230 an ideal choice for racers and performance enthusiasts seeking championship-proven braking technology.