Wilwood Forged Superlite Internal | .81"

Wilwood Forged Superlite Internal 4-Piston Caliper – 120-11128

The Wilwood Forged Superlite Internal is a lightweight, forged aluminum 4-piston caliper engineered for performance street and track applications. Featuring stainless steel pistons and a rigid forged body, this caliper delivers consistent clamping force, improved pedal feel, and reliable braking performance under demanding conditions.

This caliper is utilized in our Rear Standard Performance Big Brake Kit for the Mazda RX-7 FD3S.

Rotor Compatibility

• Recommended Rotor Width: 0.81"
• Maximum Rotor Width: 0.84"
• Minimum Rotor Width: 0.75"
• Maximum Rotor Diameter: 13.06"
• Minimum Rotor Diameter: 11.75"

Piston Specifications

• Pistons: 4
• Piston Bore Diameter: 1.38" (x4)
• Total Piston Area: 3.00 in²
• Piston Material: Stainless Steel

Brake Pad Specifications

• Pad Type: 7420
• Total Pad Area: 8.2 in²
• Total Pad Volume: 4.9 in³

Compatible with Wilwood 7420 compound lineup including BP-Q, BP-10, BP-20, BP-28, BP-30, BP-35, BP-40, and BP-45.

Mounting Specifications

• Mount Type: Lug Mount
• Mount Center Distance: 3.50"
• Mount Hole Size: 0.45"
• Mount Height: 2.85"
• Inlet Thread Size: 1/8-27 NPT
• Mount Side: Universal

Available Finishes

• Type III Hard Anodized (Gray)
• Powdercoat Black
• Powdercoat Red

Fitment

• Mazda RX-7 FD3S – Rear Standard Performance BBK (Ligma Performance / OSC Bracket System)

Important Information

• Caliper only – brackets, pads, and hardware sold separately unless selected in kit configuration
• Professional installation recommended
• Verify rotor thickness and mounting compatibility before purchase