Wilwood Forged Dynalite Internal Brake Caliper, 0.81-Inch Rotor Width, Red, 1.75-Inch Pistons

Four equal 1.75-inch stainless pistons operate inside this red Wilwood Forged Dynalite Internal caliper. Its spacerless forged aluminum body transfers fluid internally, and this version is sized for a nominally 0.81-inch-wide rotor. The 5.25-inch lug pattern must be supported by a bracket that also matches the rotor offset and pad radius. Bill Wood founded Wilwood Engineering in 1977. Based in Camarillo, California, Wilwood designs and manufactures disc brake systems and parts for motorsport, street-performance and specialized applications, from calipers and rotors to master cylinders, valves, fittings and brake lines.

This four-piston Dynalite uses internal fluid transfer in a spacerless body. Its 5.25-inch mounting pattern is only one compatibility dimension: rotor position, body clearance and hydraulic area also need to agree.

Technical Details

• Manufacturer part number: 120-13844-RD
• Component: Wilwood Forged Dynalite Internal; one caliper
• Piston arrangement: 4 pistons; 1.75-inch bores; stainless steel
• Hydraulic piston area: 4.80 square inches, as specified by Wilwood
• Pad shape: Wilwood type 7112; compound selected separately
• Mounting: universal side configuration; Lug; 5.25-inch centers; 0.39-inch mounting holes
• Mount height: 2.03 inches
• Rotor width: 0.81-inch nominal; 0.75–0.83-inch permitted range
• Rotor diameter range: 10.00–13.06 inches
• Fluid inlet: 1/8-27 NPT
• Dust boots: No
• Body and finish: Forged aluminum; Red Powder Coat

Fitment & Compatibility

Use the 0.75–0.83-inch rotor-width range to distinguish this body from thinner and wider Dynalite versions. At the mounting side, compare the 2.03-inch height, 0.39-inch hole size and type 7112 pad position rather than relying on bolt spacing alone. Before use, check wheel clearance, upper bleed access and the hose path to the 1/8-27 NPT port.

This listing covers one caliper. Match the brake pads, rotor, hose and mounting arrangement to the complete brake system.

For a brake system assembled from individual components, PMB Performance brings over 20 years of experience. Contact us with the rotor, caliper and bracket information so we can help check the combination.