Wilwood XRS4R 4-Piston Forged Brake Caliper for 14-Inch Rotors, Black - 120-17203-BK

The Wilwood XRS4R 4-Piston Forged Brake Caliper, part number 120-17203-BK, is designed for high-performance braking systems using 14-inch rotors. Manufactured from lightweight aluminum and finished with a durable black powder coat, this caliper combines reduced unsprung weight with reliable performance and a clean, professional appearance. Its forged construction provides strength and rigidity for demanding street, track, and competition applications.
The XRS4R caliper is engineered for compatibility with rotors measuring 0.810 inches thick and features a 5.980-inch radial mount configuration. The four-piston design applies even clamping force across the rotor surface, helping promote consistent braking response, improved pad wear, and dependable heat management. This caliper is supplied individually, making it suitable for replacement, custom brake-system builds, or matched front and rear applications where specified.
Wilwood is recognized for precision-engineered braking components, and the XRS4R reflects that focus with performance-oriented construction and fitment features. Verify rotor thickness, radial mount requirements, piston configuration, and vehicle-specific clearance before installation. Professional installation is recommended to ensure proper alignment, hydraulic compatibility, and safe brake-system operation.

Features:

• Brand: Wilwood

• Part Number: 120-17203-BK

• Caliper Type: Forged XRS4R brake caliper

• Piston Configuration: Four-piston design for balanced clamping force

• Material: Lightweight aluminum construction

• Finish: Durable black powder coat

• Rotor Compatibility: Designed for 14-inch outside-diameter rotors

• Rotor Thickness: Compatible with 0.810-inch-thick rotors

• Mounting Style: 5.980-inch radial mount

• Quantity: Sold individually