Fitment questions?
Call (855) 786-7101 or text (801) 304-3141. We check fitment by VIN.
Product details
The black FNSL4R uses four large 1.75-inch stainless pistons in a narrow forged body. It combines a 4.80-square-inch effective area with a nominal 1.10-inch rotor-width channel and 7416 pads. This component comes from Wilwood Engineering, established in 1977 by Bill Wood and based in Camarillo, California. Its disc brake design and manufacturing work includes calipers, brake rotors, master cylinders, valves, fittings and brake lines for motorsport, street-performance and specialized systems.
Technical Details
- Manufacturer part number: 120-11784-BK. Component: Forged Narrow Superlite 4 Radial Mount caliper.
- Supply: one brake caliper, not a complete axle brake kit. Match the mating rotor, pads, bracket and connection hardware to the installation.
- Caliper weight: approximately 5.0 lb.
- Nominal rotor width 1.10 inch; compatible outside diameter from 11.75 through 14.00 inches. Specified rotor-width limits: 1.00–1.10 inch.
- Bore configuration 1.75 inches across 4 pistons; piston material: stainless steel. Hydraulic effective area: 4.80 square inches.
- Pad fit is type 7416. Match the pad dimensions and compound to the rotor and intended braking conditions.
- Piston dust boots: not fitted.
- Construction and surface: forged aluminum housing finished in Black powder coat.
- Bracket interface: 5.98-inch radial centers with 0.39-inch holes. Specified mount height: 1.45 inches; orientation: universal.
- Hydraulic inlet thread: 1/8-27 NPT. Use a fitting with the correct thread and sealing seat.
Fitment & Compatibility
Confirm that this larger piston area suits the hydraulic system. Measure the 5.98-inch radial bracket and rotor centerline, checking pad sweep and the wheel's internal clearance at the same time.
For a replacement or custom installation, send PMB Performance the brake dimensions and existing component identification. Our 20+ years of experience can help narrow down the correct combination.
