Wilwood Black Dynapro Six-Piston Front SRP Kit, Chevrolet Sedan Delivery/One-Fifty Series/Two-Ten Series/Bel Air/Nomad/Del Ray (1955–1957), 12.19-Inch Rotors and Hubs

Black Dynapro six-piston calipers and drilled/slotted 12.19-inch rotors form this Wilwood Tri-Five Chevrolet front package. Separate hats and replacement aluminum hubs mount to the specified original drum spindles. The larger friction package is positioned by brackets and shims, with wheel mounting shifted +0.23 inches. Wilwood Engineering was founded by Bill Wood in 1977 and is based in Camarillo, California. The company designs and manufactures disc brake systems and components, including calipers, brake rotors, master cylinders, valves, fittings, and brake lines for motorsport, street-performance, and specialized applications.

Technical Details

• Manufacturer part number: 140-10737-D
• Type: Forged Dynapro 6 Big Brake Front Brake Kit (Hub)
• Calipers: Dynapro 6; 6 pistons; Black Powder Coat.
• Bores: 1.62, 1.38, 1.38 inches. Pads: BP-10.
• Rotors: 12.19-inch diameter × 0.81-inch width; SRP Drilled & Slotted, Iron, Black Electro Coat. 32 vanes.
• Wheel mounting change from OE: +.23 inches per side.
• Hubs: Hub - Hat Mount; Aluminum; Bare.
• Wheel bolt circles: 5 x 4.50; 5 x 4.75 inches.
• Included: paired calipers, pads, rotors, brackets and assembly hardware, replacement hubs, rotor hats.
• Not included: hydraulic lines, master cylinder, booster or spindles. Reuse suitable matching components.
• Conditional wheel minimum: 15 inches. Check the clearance drawing for barrel and spoke offset.

Fitment & Compatibility

Match the 1955–1957 Chevrolet model row and confirm the spindle has not been replaced by a different aftermarket arrangement. DS639 provides the bearing and bracket details. Check hub registration and the supported wheel bolt pattern, then select suitable hydraulic lines. Use the actual clearance template and include the hub shift when assessing tire position at the fender.

Match the individual model, year, submodel and brake configuration in the fitment table below.

PMB Performance has over 20 years of brake-system experience. Contact us with the vehicle and installed hardware details for fitment help.

California Proposition 65 warning — brake pads only: WARNING: This product can expose you to chemicals including Arsenic, Cadmium, Chromium (Hexavalent compounds), Lead, Nickel, Cobalt and Antimony Trioxide which are known to the State of California to cause cancer or other reproductive harm. For more information go to www.p65warnings.ca.gov.