Wilwood 1.25-Inch Rotor Width Superlite Internal Caliper, Red / 3.00-Square-Inch Piston Area

This red FSLI is the wide-rotor body with four 1.38-inch stainless pistons and 7420 pads. Its nominal rotor width is 1.25 inches, with the symmetrical bore layout and internal fluid transfer used by the Superlite Internal design. Wilwood Engineering, founded by Bill Wood in 1977, is based in Camarillo, California. The company makes and designs disc brake components and systems for motorsport, street-performance and specialized applications, including calipers, brake rotors, master cylinders, valves, fittings and brake lines.

Technical Details

• Manufacturer part number: 120-11130-RD. Component: Forged Superlite Internal caliper.
• Supply: one brake caliper, not a complete axle brake kit. Match the mating rotor, pads, bracket and connection hardware to the installation.
• Brake pad profile 7420; select friction material for the actual operating conditions.
• 4 stainless steel pistons with 1.38-inch bore diameter. The specified effective area is 3.00 sq in.
• Hydraulic inlet thread: 1/8-27 NPT. Use a fitting with the correct thread and sealing seat.
• 3.50-inch lug mounting pattern, universal; mounting height 2.85 inches and hole size 0.45 inch.
• Caliper weight: approximately 5.2 lb.
• Red powder coat finish on a forged aluminum caliper body.
• The rotor channel is specified for 1.25-inch nominal width. Rotor outside diameter: 11.75 to 13.06 inches. Specified rotor-width limits: 1.19–1.38 inch.
• Piston dust boots: not fitted.

Fitment & Compatibility

Check the 3.00-square-inch area against the required brake balance. The bracket must place the pads over the rotor correctly and keep the housing clear of the wheel's spokes and barrel.

Ask PMB Performance to check the complete brake arrangement before ordering. Our team brings over 20 years of experience; photographs and measured bracket and rotor dimensions make that check more useful.