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B&M Hi-Tek Aluminum Differential Cover for GM 8.875-Inch 12-Bolt Truck, Black 71504

B&M Hi-Tek Aluminum Differential Cover for GM 8.875-Inch 12-Bolt Truck, Black 71504
B&M Hi-Tek Aluminum Differential Cover for GM 8.875-Inch 12-Bolt Truck, Black 71504B&M Hi-Tek Aluminum Differential Cover for GM 8.875-Inch 12-Bolt Truck, Black 71504B&M Hi-Tek Aluminum Differential Cover for GM 8.875-Inch 12-Bolt Truck, Black 71504
$511.99 ea
NEWARRIVING SOONEstimated Ship Date 11/05/2024 (If Ordered Today)1 Available from HOLLEY PERFORMANCE PRODUCTS as of 10/17/2024
Model: 3998330
Select a Vehicle or refer to the Vehicle Fitment Tab below to verify that this part fits your vehicle.
STANDARD
DELIVERY
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 and cool the bearings and ring & pinion gears. Additional features include a magnetic drain plug for catching ferrous metal particles, MIL-Spec (MIL-A-8625) black anodized finish, 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 Provide Additional Support to Bearing Caps
  • Magnetic Drain Plug for Easy Servicing
  • A356.0-T6 Aluminum Construction
  • Additional .5-quart Fluid Capacity
  • MIL-Spec Black Anodized Finish
  • 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 Truck 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 ID guide and measurement drawings for specifications.
Installation Notes:
Designed to fit most vehicles with GM 8.875-inch 12-bolt Truck 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 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
71504_instructions.pdf1.62MB

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 Years Engine
Chevrolet Blazer 1969 5.7L / 350 / V8
Chevrolet Blazer 1970 5.7L / 350 / V8
Chevrolet Blazer 1971 5.7L / 350 / V8
Chevrolet Blazer 1972 5.7L / 350 / V8
Chevrolet Blazer 1973 5.7L / 350 / V8
Chevrolet Blazer 1974 5.7L / 350 / V8
Chevrolet C10 Pickup 1964 4.6L / 283 / V8
Chevrolet C10 Pickup 1965 4.6L / 283 / V8
Chevrolet C10 Pickup 1966 4.6L / 283 / V8
Chevrolet C10 Pickup 1967 4.6L / 283 / V8
Chevrolet C10 Pickup 1968 5.4L / 327 / V8
Chevrolet C10 Pickup 1969 5.3L / 327 / V8
Chevrolet C10 Pickup 1970 5.0L / 307 / V8
Chevrolet C10 Pickup 1971 5.0L / 307 / V8
Chevrolet C10 Pickup 1972 5.0L / 307 / V8
Chevrolet C10 Pickup 1973 5.7L / 350 / V8
Chevrolet C10 Pickup 1974 5.7L / 350 / V8
Chevrolet C10 1975 5.7L / 350 / V8
Chevrolet C10 1976 5.7L / 350 / V8
Chevrolet C10 1977 5.7L / 350 / V8
Chevrolet C10 1978 5.7L / 350 / V8
Chevrolet C10 1979 5.7L / 350 / V8
Chevrolet C10 1980 5.7L / 350 / V8
Chevrolet C10 1981 5.7L / 350 / V8
Chevrolet C10 1982 5.7L / 350 / V8
Chevrolet K10 Pickup 1965 4.6L / 283 / V8
Chevrolet K10 Pickup 1966 4.6L / 283 / V8
Chevrolet K10 Pickup 1969 5.7L / 350 / V8
Chevrolet K10 Pickup 1970 5.7L / 350 / V8
Chevrolet K10 Pickup 1971 5.7L / 350 / V8
Chevrolet K10 Pickup 1972 5.7L / 350 / V8
Chevrolet K10 Pickup 1973 5.7L / 350 / V8
Chevrolet K10 Pickup 1974 5.7L / 350 / V8
Chevrolet K10 1975 5.7L / 350 / V8
Chevrolet K10 1976 5.7L / 350 / V8
Chevrolet K10 1977 5.7L / 350 / V8
Chevrolet K10 1978 5.7L / 350 / V8
Chevrolet K10 1979 5.7L / 350 / V8
Chevrolet K10 1980 5.7L / 350 / V8
Chevrolet K10 1981 5.7L / 350 / V8
Chevrolet K10 1982 5.7L / 350 / V8
Chevrolet K5 Blazer 1975 5.7L / 350 / V8
Chevrolet K5 Blazer 1976 5.7L / 350 / V8
Chevrolet K5 Blazer 1977 5.7L / 350 / V8
Chevrolet K5 Blazer 1978 5.7L / 350 / V8
Chevrolet K5 Blazer 1979 5.7L / 350 / V8
Chevrolet K5 Blazer 1980 5.7L / 350 / V8
Chevrolet K5 Blazer 1981 5.7L / 350 / V8
Chevrolet K5 Blazer 1982 5.7L / 350 / V8
GMC Jimmy 1970 5.7L / 350 / V8
GMC Jimmy 1971 5.7L / 350 / V8
GMC Jimmy 1972 5.7L / 350 / V8
GMC Jimmy 1973 5.7L / 350 / V8
GMC Jimmy 1974 5.7L / 350 / V8
GMC Jimmy 1975 5.7L / 350 / V8
GMC Jimmy 1976 5.7L / 350 / V8
GMC Jimmy 1977 5.7L / 350 / V8
GMC Jimmy 1978 5.7L / 350 / V8
GMC Jimmy 1979 5.7L / 350 / V8
GMC Jimmy 1980 5.7L / 350 / V8
GMC Jimmy 1981 5.7L / 350 / V8
GMC Jimmy 1982 5.7L / 350 / V8

Specifications:

Bolt Count 12
Bolt Pattern GM 8.875 Truck
California Proposition 65 Chemical Name Chromium (hexavalent compounds)
California Proposition 65 Required Yes
Call Out Size (in) 3.27
Carrier Main Cap Support Yes
Color/Finish Black Anodized
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) 3.62
Warranty Limited Lifetime (Lifetime)

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