Wilwood 120-13864-N Powerlite 2R Radial Mount Disc Brake Caliper 2-Piston Driver Side Nickel

The Wilwood Powerlite PL2R/ST Radial Mount Brake Caliper (part number 120-13864-N) is a high-strength, lightweight two-piston caliper engineered for open-wheel and formula car road racing. Designed for applications demanding maximum clamping efficiency within a limited wheel envelope, this caliper is purpose-built for competitive motorsport where rotor diameter optimization and space constraints are critical.

Constructed from a machined billet aluminum body, this caliper features a nickel-plated Quick-Silver finish and offset 1.75-inch piston bores with common radial stud spacing and mounting offsets for straightforward integration into a variety of racing platforms. The Thermlock insulated pistons reduce heat transfer to the brake fluid, protecting braking consistency during extended race sessions. Internal piston damping springs and knock-back springs are pre-installed to deliver reliable, repeatable pedal feel corner after corner.

Key Features:

• Two-piston caliper design with 1.75 in. offset piston bores
• Nickel-plated Quick-Silver body finish for corrosion resistance
• Thermlock insulated pistons minimize heat transfer to brake fluid
• Top-loading, quick-access Type 7912 brake pads compatible in a variety of compounds
• High-temperature square-section seals for reliable performance under extreme conditions
• Internal damping springs reduce pad rattle and vibration harmonics
• Stainless steel bridge abutment plates eliminate pad-induced bridge wear
• Internal fluid passages — no external crossover tubes
• Two-piece bleed screws for easy maintenance
• Common radial stud spacing for broad racing platform compatibility
• Driver side (left-hand) orientation
• Sold individually

The Wilwood 120-13864-N is the driver-side (left-hand) caliper of the PL2R/ST series, intended for radial-mount applications. Pads are sold separately and available in multiple compounds including BP-28 and BP-45 to suit varying grip and bite preferences. This caliper is a recognized replacement for legacy PFC calipers in certain formula car applications.