Wilwood 120-17205-RD Radial Mount Caliper - XRS4R 4-Piston Red

The Wilwood 120-17205-RD is an XRS4R 4-Piston Radial Mount Caliper finished in Wilwood's signature red powdercoat. Engineered for high-performance racing and track applications, the XRS4R series delivers exceptional stopping power with a lightweight, rigid design optimized for radial mounting configurations.

Key Features:

• 4-Piston Design: Symmetric opposed-piston layout provides consistent, even pad wear and balanced braking force
• Radial Mount Configuration: Offers a more rigid, precise caliper-to-upright interface compared to traditional lug mount designs
• Lightweight Aluminum Construction: Forged or billet aluminum body minimizes unsprung weight for improved handling response
• Red Powdercoat Finish: Durable, high-temperature powdercoat in Wilwood red for lasting appearance under race conditions
• Internal Fluid Passages: Eliminates the need for external crossover lines, reducing potential leak points and improving system cleanliness
• Bleeder Screws: Positioned for effective air evacuation regardless of caliper mounting orientation
• Top-Load Pad Retention: Allows quick pad inspection and replacement without full caliper removal

The Wilwood XRS4R caliper is a purpose-built race caliper designed for competitors who demand maximum braking consistency and reliability. Its radial mount architecture is well-suited for custom brake system builds, late model racing, and high-performance street or track vehicles using compatible Wilwood rotor and bracket combinations.