Wilwood Forged Dynalite Internal Dust Seal Caliper in Red, Four 1.38-Inch Pistons

Match this red Wilwood Forged Dynalite Internal Dust Seal to a brake assembly requiring 0.81-inch rotor width and 1.38-inch pistons. The 4-piston caliper uses 5.25-inch lug mounting rather than a vehicle-specific adapter supplied as a kit. Wilwood Engineering’s disc brake range includes calipers, rotors, master cylinders, valves, fittings and brake lines. Bill Wood founded the company in 1977 in California; it is based in Camarillo and serves motorsport, street-performance and specialized brake applications.

Piston dust wipers distinguish this sealed four-piston Dynalite Internal from the unsealed model. Its spacerless body and internal fluid transfer are matched to type 7112 pads and the selected rotor-width capacity.

Technical Details

• Manufacturer part number: 120-14446-RD
• Component: Wilwood Forged Dynalite Internal Dust Seal; one caliper
• Piston arrangement: 4 pistons; 1.38-inch bores; stainless steel
• Hydraulic piston area: 3.00 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: Yes
• Body and finish: Forged aluminum; Red Powder Coat

Fitment & Compatibility

Set up the brake assembly around the specified rotor and pad geometry. Check the mount drawing and wheel envelope, and confirm that the piston area suits the rest of the hydraulic system.

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

PMB Performance has worked with parts and brake fitment for over 20 years. Supply the installed caliper identity and the rotor and bracket measurements for a practical compatibility check.