Wilwood Polished Left Narrow Superlite 6 Radial Caliper, 1.10-Inch Rotor Width

This polished left FNSL6R combines a forged radial-mount body with six differential stainless pistons. It is the nominal 1.10-inch rotor-width model, with 7416 pad fit and a 4.04-square-inch area. Wilwood Engineering is a Camarillo, California-based designer and manufacturer of disc brake systems, founded by Bill Wood in 1977. Calipers, brake rotors, master cylinders, valves, fittings and brake lines form its range for motorsport, street-performance and specialized applications.

Technical Details

• Manufacturer part number: 120-11781-P. 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.
• The rotor channel is specified for 1.10-inch nominal width. Rotor outside diameter: 11.75 to 14.00 inches. Specified rotor-width limits: 1.00–1.10 inch.
• 6 stainless steel pistons with 1.62/1.12/1.12-inch bore groups. The specified effective area is 4.04 sq in.
• 5.98-inch radial mounting pattern, left hand; mounting height 1.45 inches and hole size 0.39 inch.
• Brake pad profile 7416; select friction material for the actual operating conditions.
• polished finish on a forged aluminum caliper body.
• Hydraulic inlet thread: 1/8-27 NPT. Use a fitting with the correct thread and sealing seat.
• Piston dust boots: not fitted.
• Caliper weight: approximately 5.0 lb.

Fitment & Compatibility

The mounting bracket must locate the left-hand body correctly over the rotor. Check 5.98-inch centers, pad sweep and inlet clearance; a polished version still needs the same dimensional checks as any other finish.

PMB Performance has worked with brake components for over 20 years. Share the required piston sizing, rotor measurements and bracket drawing for help checking the match.