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B&M Hi-Tek Aluminum Differential Cover for GM 8.875-Inch 12-Bolt Car 70500

B&M Hi-Tek Aluminum Differential Cover for GM 8.875-Inch 12-Bolt Car 70500
B&M Hi-Tek Aluminum Differential Cover for GM 8.875-Inch 12-Bolt Car 70500B&M Hi-Tek Aluminum Differential Cover for GM 8.875-Inch 12-Bolt Car 70500B&M Hi-Tek Aluminum Differential Cover for GM 8.875-Inch 12-Bolt Car 70500
$31.99 ea
NEWARRIVING SOONEstimated Ship Date 05/27/2025 (If Ordered Today)11 Available from HOLLEY PERFORMANCE PRODUCTS as of 05/07/2025
Model: 3998321
Select a Vehicle or refer to the Vehicle Fitment Tab below to verify that this part fits your vehicle.
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Our engineers designed the line of Hi-Tek differential covers to not only look good but address a number of weaknesses of the factory-stamped steel covers. First, they started by constructing the covers of thick A356.0-T6 aluminum, which dissipates heat much faster than the factory steel unit keeping the fluid temperature lower under high-stress loads vs. a steel cover. Then for added durability, we added a reinforced center bar for extra strength along with load bolts to help prevent bearing cap deflection under severe loads. The internal shape of the cover retains the smooth round back internally to help keep the fluid flow going over the ring gear to properly lubricate the gears and bearings. Additional features include a magnetic drain plug for catching ferrous metal particles, a machined B&M logo and all necessary hardware, and easy-to-follow detailed instructions for a quick and simple installation you can do at home. Note: Gasket not included
Features:
  • Load Bolts for Additional Support for Bearing Caps
  • Magnetic Drain Plug for Easy Servicing
  • A356.0-T6 Aluminum Construction
  • Additional .5-quart Fluid Capacity
  • Over 65 Years of B&M Quality
  • Lifetime Limited Warranty
  • Machined B&M Logo
Designed to fit most vehicles with GM 8.875-inch 12-bolt Car differential, however, vehicles may have other interfering components that may require modifications or moving of existing brackets, require longer cover bolts or different cover bolts, clearance of sway bars, etc. - Checking for adequate clearance and fitment for your application should be verified prior to purchase & installation. Refer to the ID guide and measurement drawings for specifications.
Installation Notes:
Designed to fit most vehicles with GM 8.875-inch 12-bolt Car differential, however, vehicles may have other interfering components that may require modifications or moving of existing brackets, require longer cover bolts or different cover bolts, clearance of sway bars, etc. - Checking for adequate clearance and fitment for your application should be verified prior to purchase & installation. Refer to the ID guide and measurement drawings for specifications.
About B&M Racing

B&M® specializes in performance automatic transmissions, torque converters, SFI approved flexplates, legendary automatic shifters, precision manual shifters, and many other transmission products including cast deep aluminum transmission pans, transmission coolers, and automatic transmission fluid. B&M Performance & Off-Road has been at the vanguard of the growing automotive aftermarket since the early 1950s. Racers themselves, B&M’s founders identified the needs of local performance enthusiasts and developed products to fill those needs. B&M specializes in performance automatic transmissions, torque converters, SFI approved flexplates, legendary automatic shifters, precision manual shifters, automatic shift handles, extended transfer case handles, cast deep aluminum transmission pans, differential covers, transmission coolers, power steering coolers, automatic transmission fluid, and transmission accessories for performance street, truck, Jeep, and off-road applications.

Downloads:

Download Name File Size
bm_warranty.pdf87.47KB
70500_instructions.pdf1.2MB

Videos:

Vehicle Fitment:

The Vehicle Fitment Guide is to be used as a general reference. The data has been provided by our suppliers and manufacturers and may contain errors or incorrect data. Always refer to a professional to verify correct fitment for your vehicle.
Make Model Submodel Years Engine
Chevrolet Camaro Base 1967 6.5L / 396 / V8
5.3L / 327 / V8
4.1L / 250 / L6
3.8L / 230 / L6
Chevrolet Camaro Base 1968 5.4L / 327 / V8
5.3L / 327 / V8
4.1L / 250 / L6
3.8L / 230 / L6
Chevrolet Camaro Base 1969 5.4L / 327 / V8
7.0L / 427 / V8
5.0L / 307 / V8
5.3L / 327 / V8
4.1L / 250 / L6
5.7L / 350 / V8
3.8L / 230 / L6
Chevrolet Camaro Base 1970 5.0L / 307 / V8
4.1L / 250 / L6
5.7L / 350 / V8
Chevrolet Camaro Base 1971 6.6L / 402 / V8
5.0L / 307 / V8
4.1L / 250 / L6
5.7L / 350 / V8
Chevrolet Camaro Base 1972 6.6L / 402 / V8
5.0L / 307 / V8
4.1L / 250 / L6
5.7L / 350 / V8
Chevrolet Camaro RS 1967 5.7L / 350 / V8
6.5L / 396 / V8
3.8L / 230 / L6
5.3L / 327 / V8
4.1L / 250 / L6
Chevrolet Camaro RS 1968 5.4L / 327 / V8
3.8L / 230 / L6
5.3L / 327 / V8
4.1L / 250 / L6
Chevrolet Camaro RS 1969 5.4L / 327 / V8
5.7L / 350 / V8
5.0L / 307 / V8
3.8L / 230 / L6
5.3L / 327 / V8
7.0L / 427 / V8
4.1L / 250 / L6
Chevrolet Camaro RS 1970 5.7L / 350 / V8
5.0L / 307 / V8
4.1L / 250 / L6
Chevrolet Camaro RS 1971 5.7L / 350 / V8
5.0L / 307 / V8
4.1L / 250 / L6
Chevrolet Camaro RS 1972 5.7L / 350 / V8
5.0L / 307 / V8
4.1L / 250 / L6
Chevrolet Camaro SS 1967 6.5L / 396 / V8
5.7L / 350 / V8
Chevrolet Camaro SS 1968 6.5L / 396 / V8
5.7L / 350 / V8
Chevrolet Camaro SS 1969 6.5L / 396 / V8
5.7L / 350 / V8
Chevrolet Camaro SS 1970 5.7L / 350 / V8
6.6L / 402 / V8
Chevrolet Camaro SS 1971 5.7L / 350 / V8
6.6L / 402 / V8
Chevrolet Camaro SS 1972 5.7L / 350 / V8
6.6L / 402 / V8
Chevrolet Camaro Z28 1967 4.9L / 302 / V8
Chevrolet Camaro Z28 1968 4.9L / 302 / V8
Chevrolet Camaro Z28 1969 4.9L / 302 / V8
Chevrolet Camaro Z28 1970 5.7L / 350 / V8
Chevrolet Camaro Z28 1971 5.7L / 350 / V8
Chevrolet Camaro Z28 1972 6.6L / 402 / V8
5.7L / 350 / V8

Specifications:

Bolt Count 12
Bolt Pattern GM 8.875
California Proposition 65 Chemical Name Chromium (hexavalent compounds)
California Proposition 65 Required Yes
Call Out Size (in) 3.6
Carrier Main Cap Support Yes
Color/Finish Raw Aluminum
Drain Plug Included Yes
Emission Code 5
Filler Plug Included Yes
Gasket Included No
Material A356.0-T6 Aluminum
Part Type Differential Cover
Product Type Differential Cover
Proposition 65 www.P65Warnings.ca.gov
Thickness (in) 3.6
Warranty Limited Lifetime (Lifetime)

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