Wilwood 120-17203-BK Radial Mount Caliper - XRS4R 4-Piston Black

The Wilwood 120-17203-BK is a XRS4R 4-Piston Radial Mount Brake Caliper finished in a durable black powder coat. Part of Wilwood's performance-focused XR-series caliper lineup, this caliper is engineered for high-performance street and competition applications demanding superior clamping force, light weight, and thermal management.

Key Features:

• 4-Piston radial mount design for rigid, consistent brake force application
• Forged billet aluminum construction for maximum strength-to-weight ratio
• Black powder coat finish for corrosion resistance and aggressive appearance
• FEA-optimized body design eliminates unnecessary bulk while maintaining structural rigidity
• High-temperature seals for reliable performance under sustained braking loads
• Radial mount bolt pattern for direct, positive caliper-to-upright attachment
• Compatible with Wilwood's broad range of brake pads and hardware

Wilwood Engineering has been designing and manufacturing high-performance disc brake systems since 1977. The XRS4R caliper reflects decades of motorsport experience and precision manufacturing, delivering a firm pedal feel and outstanding stopping power for performance builds and race applications.