DuraGo BD8504 Brake Drum - Front or Rear

DuraGo BD8504 Brake Drum Overview

The DuraGo BD8504 brake drum is built for rear and front applications that require a 12-inch nominal drum diameter and a 5-lug, 127 mm bolt circle. It is a direct-fit replacement for select Cadillac DeVille, Cadillac Fleetwood, Cadillac Brougham, and Oldsmobile Delta 88 and 98 applications listed below.

Manufactured by ISO-certified factories, this DuraGo brake drum focuses on fit, form, and function for service work on classic and heavy-duty passenger vehicles. The BD8504 is a practical choice when replacing a worn drum on a Cadillac Fleetwood rear brake or a Cadillac DeVille front brake application.

Key Features

• Part number BD8504
• Cast iron / steel top construction
• Nominal drum diameter: 12 in. (304.8 mm)
• Maximum brake diameter discard: 12.09 in. (307.09 mm)
• Outside diameter: 14.49 in. (368 mm)
• Brake surface width: 2.96 in. (75.2 mm)
• 5 bolt holes with 127 mm bolt circle diameter
• Center hole diameter: 3.06 in. (77.7 mm)
• Overall height: 5.05 in. (128.3 mm)
• ABS tone ring not included
• Outer cooling fins not included

Detailed Description

DuraGo BD8504 is a brake drum replacement engineered for vehicles that use a 12-inch rear drum or 12-inch front drum setup. The composite construction with a cast iron / steel top supports stable braking performance in service applications where correct drum dimensions matter. This part number BD8504 cross-references MTC/Ronak 8504 for the same application.

Compatible fitment includes Fits 1987-1990 Cadillac Brougham, Rear, Fits 1977-1985 Cadillac Fleetwood, Rear, Fits 1959-1976 Cadillac DeVille, Rear, Fits 1965-1976 Cadillac Fleetwood, Rear, Fits 1971-1976 Oldsmobile Delta 88, Rear, Fits 1975 Oldsmobile 98, Rear, Fits 1961-1970 Cadillac DeVille, Front, and Fits 1965-1970 Cadillac Fleetwood, Front. Searchers looking for a Cadillac DeVille rear brake drum replacement or an Oldsmobile Delta 88 heavy duty rear drum will find this application-specific listing helpful.

Common Problems This Part Addresses

• Brake pulsation caused by drum wear beyond discard diameter
• Reduced braking consistency from an out-of-spec drum surface
• Noise or vibration linked to drum distortion or scoring
• Fitment issues when replacing a 12-inch rear or front drum on listed Cadillac and Oldsmobile models
• Service delays when the original drum no longer meets dimensional requirements

Installation Notes and Tips

Verify the drum diameter, bolt circle, center hole, and brake surface width against the existing part before installation. Confirm whether the vehicle uses a front or rear drum application, since this part fits both positions depending on the model and year. Clean the hub mounting surface and inspect shoes, wheel cylinders, and hardware condition before final assembly. For best results, measure the existing drum against the discard specification of 12.09 inches before reuse or replacement decisions.

Quality Assurance

DuraGo manufactures brake drums through ISO-certified factories and builds this program around catalog accuracy and consistent fitment for professional repair use. The brand’s long history in aftermarket brake components supports a parts selection process centered on dimensional accuracy and application coverage.