Wilwood Dynalite Internal Brake Caliper with 1.75-Inch Pistons, Red Lug Body

This red Wilwood Forged Dynalite Internal brings four 1.75-inch stainless pistons to a brake assembly using a nominally 1.10-inch-wide rotor. Internal fluid transfer keeps the hydraulic passages within the caliper body, and the lugs attach on 5.25-inch centers. 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.

Technical Details

• Manufacturer part number: 120-13846-RD
• Mounting: universal side configuration; Lug; 5.25-inch centers; 0.39-inch mounting holes
• Mount height: 2.03 inches
• Rotor width: 1.10-inch nominal; 1.05–1.13-inch permitted range
• Rotor diameter range: 10.00–13.06 inches
• Pad shape: Wilwood type 7112; compound selected separately
• Piston arrangement: 4 pistons; 1.75-inch bores; stainless steel
• Hydraulic piston area: 4.80 square inches, as specified by Wilwood
• Body and finish: Forged aluminum; Red Powder Coat
• Fluid inlet: 1/8-27 NPT
• Dust boots: No
• Component: Wilwood Forged Dynalite Internal; one caliper

Fitment & Compatibility

Confirm rotor diameter as well as thickness, and allow for pad and caliper clearance inside the wheel. The mount pattern is a dimensional requirement rather than a vehicle fitment guarantee.

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

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.

Ask PMB Performance for help comparing this caliper with your existing assembly. Our over 20 years of experience are most useful when you provide rotor size, mounting details and the current piston configuration.