Wilwood Plain-Rotor Front Brakes with Red Dynalite Calipers, Oldsmobile 88/98/Deluxe 88/Standard 88/Super 88/Series 60/Series 70/Series 90/Series 66/Series 68/Series 76/Series 78/Series 96/Series 98/E-47/F-47/G-47/J-47/L-47/Series 88 (1940–1952)

This Wilwood front kit pairs red four-piston Dynalite calipers with plain 11.75-inch iron rotor rings and replacement hubs. The mounting is selected for the listed 1940–1952 Oldsmobile drum-spindle applications, including the exact Series and Eight model conditions. It is a disc conversion that retains the suitable original spindle while changing the hub and brake assembly. 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: 140-12617-R
• Type: Forged Dynalite Pro Series Front Brake Kit
• Calipers: Forged Dynalite Internal; 4 pistons per caliper; Red Powder Coat.
• Caliper bore sizes: 1.75, 1.75 inches. Piston type: Stainless.
• Included pad compound: BP-10.
• Rotors: 11.75-inch diameter × 0.81-inch thickness; Plain Face; Iron; Plain surface; 32 vanes.
• Wheel mounting change from OE: +.039 inches per side.
• Replacement hubs: Hub - Vented Rotor Offset; Aluminum; Bare.
• Wheel bolt circles: 5 x 5.00 inches.
• Included: paired calipers, pads, rotors, mounting brackets and assembly hardware, replacement hubs.
• Hydraulic lines and fittings selected separately. No master cylinder, booster or spindles are supplied.
• Conditional wheel screening size: 15 inches. Use the installation clearance diagram to verify the actual barrel and spoke profile.
• Wheel-contact support requirement: if the wheel contact surface overhangs the hub face, use the specified 6.60-inch-diameter × 0.20-inch-thick steel spacer between hub and wheel. The spacer is supplied with this kit.
• The wheel-clearance drawing includes the supplied wheel spacer installed; account for its thickness and stud engagement in the completed wheel arrangement.
• For stamped steel wheels whose contact area does not overhang the hub, Wilwood recommends the separate 6.15-inch-diameter × 0.09-inch-thick hub shield to protect the hub face; this is distinct from the required overhang-support spacer.

Fitment & Compatibility

Later Oldsmobile applications need their own model check: 98 is listed for 1950–1952, Deluxe 88 and Super 88 for 1951–1952, and Standard 88 for 1951. These entries do not extend automatically to every earlier Series model. Compare the specific drum spindle and bearing dimensions with DS936 before fitting the red-caliper conversion. The 0.039-inch outward change at the replacement hub and any required wheel-support spacer must be considered together when checking tire position. Verify the five-on-five-inch pattern, complete wheel-face seating and clearance around the caliper bridge. Hoses are a separate purchase. Review pushrod geometry and available master-cylinder travel as part of the disc conversion, then evaluate hydraulic balance against the existing rear braking package.

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

Wilwood installation documents: Installation instructions.

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

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.