Wilwood 120-17202-BK Radial Mount Disc Brake Caliper Black - XRS4R 4-Piston

The Wilwood 120-17202-BK XRS4R is a high-performance 4-piston radial mount disc brake caliper finished in a durable black powder coat. Engineered for motorsport and high-performance street applications, the XRS4R caliper is part of Wilwood's Extreme Race Series, designed to deliver consistent, fade-resistant braking under sustained high-heat conditions.

The XRS4R features a forged aluminum body construction for an exceptional strength-to-weight ratio. Radial mount geometry provides superior rigidity compared to traditional lug-mount designs, resulting in improved brake feel and more consistent pad-to-rotor contact. The four-piston configuration delivers even clamping force across the full face of the brake pad for maximum stopping efficiency.

Key Features:

• 4-piston radial mount design for superior rigidity and brake feel
• Forged aluminum body construction — lightweight and extremely strong
• Black powder coat finish for corrosion resistance and clean appearance
• Part of Wilwood's Extreme Race Series (XRS) lineup
• Stainless steel pistons for enhanced thermal and corrosion resistance
• High-temperature seals suitable for performance and motorsport use
• Accepts Wilwood's full range of high-performance brake pads
• Bleeder screw included

The Wilwood XRS4R caliper is an ideal upgrade for track day competitors, road racers, and performance enthusiasts seeking proven, race-proven braking technology with OEM-quality fitment and finish.