Fitment questions?
Call (855) 786-7101 or text (801) 304-3141. We check fitment by VIN.
Product details
An individual Wilwood FNSL6R-ST left brake caliper, finished in anodized, is specified here. Use the 1.75/1.25/1.25-inch piston bores, 5.98-inch mounting centers and 1.25-inch rotor width to compare it with the existing brake assembly. Founded by Bill Wood in 1977, Wilwood Engineering is based in Camarillo, California. It designs and manufactures disc brake systems and components, including calipers, brake rotors, master cylinders, valves, fittings and brake lines, for motorsport, street-performance and specialized applications. Components must be selected to suit the complete brake 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: 120-15777
- 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 1.75/1.25/1.25 inches
- Hydraulic piston area: 4.86 square inches
- Dust boots: No
- Brake pad shape: 7416; shape number does not specify a friction compound
- Nominal rotor width: 1.25 inches
- Rotor width range: 1.19–1.25 inches
- Rotor diameter range: 11.75–14.00 inches
- Caliper weight reference: 4.9 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
Compare the caliper drawing with your radial bracket before ordering. The 5.98-inch mounting centers and 1.75/1.25/1.25-inch bores must suit the installed rotor offset and hydraulic system. Use the left-hand caliper and keep the bleed arrangement in the specified orientation. A suitable pad sweep and clearance inside the wheel must be verified independently of rotor width.
Wilwood caliper specifications
For help selecting the correct caliper, contact PMB Performance with the brake package and measured mounting arrangement. Our over 20 years of parts and fitment experience supports a configuration check before purchase.
