GM 8.875 12 Bolt Car Differential Cover – Heavy Duty Aluminum Performance Upgrade

Enhance the performance and protection of your drivetrain with this GM 8.875 12 Bolt Car Differential Cover, designed to provide superior strength and improved cooling for street and performance applications. Whether you're restoring a classic muscle car or building a high-performance setup, this upgraded cover helps maintain optimal differential performance.

Constructed from high-quality aluminum, this differential cover offers increased durability compared to factory stamped covers. The robust design helps protect internal components while improving heat dissipation to keep your differential operating at optimal temperatures.

Engineered as a direct-fit replacement for GM 8.875 12 bolt car differentials, this cover ensures reliable sealing, enhanced strength, and long-lasting performance.

✅ Key Features:

• Fits GM 8.875 12 bolt car differentials
• Heavy-duty aluminum construction for strength and durability
• Improves heat dissipation and cooling
• Provides added protection for internal components
• Ideal for street performance, restoration, and classic builds
• Direct fit for easy installation and leak-free sealing

Upgrade your differential with confidence and ensure maximum durability and performance for your vehicle.

Volume: 1.0 quarts over stock

Dimensions: Click here for dimensions. 

Depth inside is 3 ¾ inches

Number of Bolts: 12 bolts

This PML cover fits the GM 8.875 inch (8 7/8") ring gear 12 bolt differential for cars.

Benefits:

• Extra capacity
• Drain hole and magnetic plug to simplify maintenance
• Fins for heat dissipation and classic styling
• Sand cast aluminum construction for thick walls
• Machined gasket flange for a secure seal
• Round shape similar to stock cover

We have one of these on SPECIAL.

Applications:

This differential cover fits the rear end on the GM Corporation 8 7/8" (8.875") 12 bolt differentials used on many GM and Chevy cars in the 1960s and 1970s. Some vehicles which may be able to use this cover include:

• Camaro 1967 to 1972
• Chevelle 1965 to 1972
• El Camino 1965 to 1972
• Monte Carlo 1970 to 1972
• Nova 1965 to 1967

Always check to verify differential and clearance for a larger cover. Configurations vary. GM 8.2 inch ring gear 10 bolt differentials were also used on many of these vehicles. This cover is larger than stock so check space available.

Oldsmobile cars in the 1960s and 1970s may have a similar looking 12 bolt rear differential cover. Oldsmobile offered a similar differential for such vehicles as the 442 and Cutlass. The differential cover for these applications is about 1/4 inch different than this one. PML does not make a cover for these Oldsmobile differentials.

Cadillac also made their own differentials for some of their cars.

Drain

During servicing, a hole on bottom of PML cover provides quick and easy draining fluid without removing the cover. PML includes a magnetic drain plug with each cover.

Cover also ships with new mounting bolts.

PML Differential Cover Compared to Stock

   
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