Wilwood Black Forged Dynalite Internal Dust Seal, 4-Piston Caliper for 0.81-Inch-wide Rotor with 5.25-Inch Lug Centers

This Wilwood Forged Dynalite Internal Dust Seal is a 4-piston brake caliper with a black finish for a nominally 0.81-inch-wide rotor. Its 5.25-inch lug mounting centers and 1.75-inch piston bores must match the brake assembly. Wilwood Engineering was founded by Bill Wood in 1977 and is based in Camarillo, California. The company makes disc brake systems and components, including calipers, rotors, master cylinders, valves, fittings and brake lines for motorsport, street-performance and specialized 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: 120-14447-BK
• Component: Wilwood Forged Dynalite Internal Dust Seal; 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: Yes
• Body and finish: Forged aluminum; Black Powder Coat

Fitment & Compatibility

Check mounting-center spacing and bracket offset together, then confirm the pad sits fully on the rotor friction surface. Piston area must suit the master cylinder and front-to-rear brake balance.

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

PMB Performance has over 20 years of brake and parts experience. Send us the caliper specifications, rotor measurements and bracket details if you need help selecting the correct component.