MPA Electrical NM1328 Brake Master Cylinder

Brake Master Cylinder for Front Drum Brake Applications

The MPA Electrical NM1328 brake master cylinder is a standard replacement hydraulic unit for classic GM vehicles with front drum brakes. It is built with a cast iron body, integral reservoir, and a 1-inch bore to restore consistent brake pedal response and hydraulic pressure.

Compatible With 1967-1970 Buick LeSabre and Riviera, 1967-1970 Oldsmobile 98 and Delta 88, 1967-1970 Pontiac Bonneville and Catalina, plus select 1967-1968 Cadillac, Oldsmobile, and Pontiac models with front drum brakes.

• Brand: MPA Electrical
• Part number: NM1328
• Brake master cylinder for front drum brake vehicles
• Cast iron master cylinder construction
• Integral reservoir design with reservoir included
• 1-inch master cylinder bore diameter
• Standard replacement grade
• Master cylinder cap included
• Uses DOT 3 brake fluid

Product Details

MPA Electrical NM1328 is engineered as a direct hydraulic replacement for vehicles that use a front drum brake setup. The cast iron housing and integral reservoir support stable fluid delivery, while the 1-inch bore size matches the application requirements for proper pedal feel and braking performance. This part cross-references 1489981 and 5474057 for the same application.

The MPA Electrical brake master cylinder line is focused on restoring braking performance through OE-based testing and specification checks. For buyers searching for a brake master cylinder for 1967-1970 Buick LeSabre, a 1967-1970 Pontiac Catalina brake master cylinder, or a 1967-1968 Cadillac DeVille master cylinder, NM1328 is the listed application.

What It Helps Address

• Low or inconsistent brake pedal pressure
• Internal hydraulic leakage in the master cylinder
• Brake fluid loss at the master cylinder assembly
• Reduced braking response in front drum brake systems
• Wear-related braking performance decline on classic vehicles

Installation Notes

Verify the vehicle uses front drum brakes before installation. This master cylinder has 2 mounting holes, a 0.430-inch mounting hole diameter, and no brake booster, push rod, mounting bracket, or mounting hardware included. Bleed the hydraulic system thoroughly after installation and fill with DOT 3 brake fluid only.

Quality Assurance

MPA Electrical tests each unit against OE specifications using controlled processes and sample-based validation to support consistent braking performance out of the box. The NM1328 is a new, standard replacement brake master cylinder built for the listed classic GM applications.

• Fits 1967-1970 Buick LeSabre, N/A, New with front drum brakes
• Fits 1967-1970 Buick Riviera, N/A, New with front drum brakes
• Fits 1967-1970 Oldsmobile 98, N/A, New with front drum brakes
• Fits 1967-1970 Oldsmobile Delta 88, N/A, New with front drum brakes
• Fits 1967-1970 Pontiac Bonneville, N/A, New with front drum brakes
• Fits 1967-1970 Pontiac Catalina, N/A, New with front drum brakes
• Fits 1967-1968 Cadillac DeVille, N/A, New with front drum brakes
• Fits 1967-1968 Cadillac Fleetwood, N/A, New with front drum brakes
• Fits 1967-1968 Oldsmobile Toronado, N/A, New with front drum brakes
• Fits 1967-1968 Pontiac Grand Prix, N/A, New with front drum brakes
• Fits 1967 Cadillac Eldorado, N/A, New with front drum brakes
• Fits 1967 Pontiac Tempest, N/A, New with front drum brakes