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Product details
A 1.10-inch rotor-width specification and 1.38/1.12/1.12-inch piston bores identify this left Wilwood FNSL6R-ST brake caliper. The anodized finish is applied to the exact component described below; match the mounting bracket before replacement. For motorsport, street-performance and specialized braking applications, Wilwood Engineering designs and manufactures disc brake systems and their individual components. Founded by Bill Wood in 1977 and based in Camarillo, California, Wilwood supplies a range encompassing calipers, rotors, master cylinders, valves, fittings and brake lines, all selected to match the complete system. The Forged Narrow Superlite 6R-ST uses radial mounting and six Thermlock insulated pistons. Radial mounting permits bracket adjustment but still requires accurate rotor centering, mounting height and pad sweep. Check the differential bores when matching an existing brake system.
Technical Details
- Manufacturer part number: 120-16054
- Component: Forged Narrow Superlite 6 Radial Mount; one individual caliper
- Placement: Left
- Construction and finish: Forged aluminum; Type III Anodize
- Pistons: 6; Thermlock insulated; bore dimensions 1.38/1.12/1.12 inches
- Hydraulic piston area: 3.46 square inches
- Dust boots: No
- Brake pad shape: 7416; shape number does not specify a friction compound
- Nominal rotor width: 1.10 inches
- Rotor width range: 1.00–1.10 inches
- Rotor diameter range: 11.75–14.00 inches
- Caliper weight reference: 5.0 lb
- Mounting interface: Radial; mounting centers 5.98 inches
- Mounting-hole diameter: 0.39 inches
- Mount height: 1.45 inches
- Hydraulic inlet thread: 1/8-27 NPT
Fitment & Compatibility
Choose this component around the existing rotor and bracket, including the 1.10-inch nominal rotor width and 5.98-inch mounting span. Use the left-hand caliper and keep the bleed arrangement in the specified orientation. Compare pad support, caliper offset and piston volume with the brake being replaced. Wheel size alone cannot confirm spoke or barrel clearance.
Wilwood caliper specifications · Wilwood technical reference
Share the vehicle and the brake system actually installed with PMB Performance before ordering if the configuration is uncertain. We draw on over 20 years of parts and fitment experience when comparing the rotor, mount and caliper.
