Wilwood Left FNSL6R Black Caliper, 1.10-Inch Rotor Width / 3.46-Square-Inch Area: Black Narrow Superlite caliper in an angled view, showing the branded face, center bridge bolt and upper pad opening.

Wilwood Left FNSL6R Black Caliper, 1.10-Inch Rotor Width / 3.46-Square-Inch Area

SKU: 120-12003-BK

$430.93 Sale
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Fitment questions?

Call (855) 786-7101 or text (801) 304-3141. We check fitment by VIN.

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Product details

The black left FNSL6R pairs a nominal 1.10-inch rotor-width channel with the 1.38/1.12/1.12-inch stainless piston combination. It provides the smaller 3.46-square-inch hydraulic configuration in the narrow forged body. 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: 120-12003-BK. Component: Forged Narrow Superlite 6 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.
  • Bore configuration 1.38/1.12/1.12 inches across 6 pistons; piston material: stainless steel. Hydraulic effective area: 3.46 square inches.
  • Hydraulic inlet thread: 1/8-27 NPT. Use a fitting with the correct thread and sealing seat.
  • Pad fit is type 7416. Match the pad dimensions and compound to the rotor and intended braking conditions.
  • Bracket interface: 5.98-inch radial centers with 0.39-inch holes. Specified mount height: 1.45 inches; orientation: left hand.
  • 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.
  • Piston dust boots: not fitted.
  • Construction and surface: forged aluminum housing finished in Black powder coat.

Fitment & Compatibility

Confirm the left-hand differential arrangement and correct radial bracket. Check 5.98-inch centers, 7416 pad fit and rotor offset rather than assuming another FNSL6R bore set is equivalent.

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.