Fitment questions?
Call (855) 786-7101 or text (801) 304-3141. We check fitment by VIN.
Product details
The Wilwood Forged Dynalite Internal is specified for 1.00-inch rotor width, 5.25-inch lug mounting and 1.75-inch piston bores. This Type III anodized 4-piston component is selected by brake-system geometry rather than vehicle year alone. Founded in 1977 by Bill Wood, Camarillo, California-based Wilwood Engineering manufactures disc brake components for motorsport, street-performance and specialized uses. Its range covers calipers, rotors, 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: 120-13845
- Component: Wilwood Forged Dynalite Internal; one caliper
- Body and finish: Forged aluminum; Type III anodized
- Dust boots: No
- Piston arrangement: 4 pistons; 1.75-inch bores; stainless steel
- Hydraulic piston area: 4.80 square inches, as specified by Wilwood
- Mounting: universal side configuration; Lug; 5.25-inch centers; 0.39-inch mounting holes
- Mount height: 2.03 inches
- Fluid inlet: 1/8-27 NPT
- Pad shape: Wilwood type 7112; compound selected separately
- Rotor width: 1.00-inch nominal; 0.94–1.04-inch permitted range
- Rotor diameter range: 10.00–13.06 inches
Fitment & Compatibility
Compare the installed rotor’s nominal width with this exact caliper version. Before assembly, verify pad sweep, caliper-to-wheel clearance and the hose fitting’s thread and sealing method.
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.
