Wilwood 120-17204-RD Radial Mount Caliper - XRS4R 4-Piston Red

The Wilwood 120-17204-RD is a high-performance XRS4R 4-piston radial mount disc brake caliper finished in a bright red anodize. Designed for motorsport and street performance applications, the XRS4R series features a forged billet aluminum body that delivers exceptional strength while keeping weight to a minimum.

Key Features:

• 4-Piston Fixed Caliper Design — Provides balanced, even clamping force across the brake pad for consistent, fade-resistant stopping power
• Radial Mount Configuration — Allows precise alignment to the rotor for reduced caliper flex and improved pedal feel
• Forged Billet Aluminum Body — High-strength construction resists heat and mechanical stress while minimizing unsprung weight
• Red Anodized Finish — Durable, corrosion-resistant coating with an aggressive visual appearance
• High-Temperature Fluid Compatible — Engineered to perform with DOT 3, DOT 4, and DOT 5.1 brake fluids under demanding conditions
• Stainless Steel Pistons — Resist heat transfer from rotor to fluid, helping to prevent brake fade and vapor lock
• Symmetrical Pad Replacement — Tool-free or minimal-tool pad swap for convenient trackside service

The Wilwood XRS4R caliper is a purpose-built performance braking component suited for road racing, autocross, and high-performance street builds. Part number 120-17204-RD is finished in red anodize and is sold as a single caliper unit.