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Description
B&M Hi-Tek Aluminum Differential Cover for GM 8.875-inch 12-bolt Truck - 70504Overview: 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
Overview:
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, 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
- Additional .50-quart Fluid Capacity
- A356.0-T6 Aluminum Construction
- Over 65 Years of B&M Quality
- Lifetime Limited Warranty
- Machined B&M Logo
Application:
| Year | Make | Model | Submodel | Engine Size |
|---|---|---|---|---|
| 1967 - 1982 | Chevrolet | K10 Suburban | ||
| 1967 - 1974 | GMC | K15/K1500 Suburban | ||
| 1967 - 1974 | GMC | K25/K2500 Suburban | ||
| 1967 - 1974 | GMC | C15/C1500 Suburban | ||
| 1967 - 1974 | GMC | C25/C2500 Suburban | ||
| 1975 - 1978 | GMC | K15 Suburban | ||
| 1979 - 1982 | GMC | K1500 Suburban | ||
| 1975 - 1978 | GMC | K25 | ||
| 1979 - 1981 | GMC | K2500 | ||
| 1975 - 1978 | GMC | K25 Suburban | ||
| 1979 - 1982 | GMC | K2500 Suburban | ||
| 1969 - 1987 | Chevrolet | Blazer | ||
| 1975 - 1982 | Chevrolet | K5 Blazer | ||
| 1964 - 1974 | Chevrolet | G10 Van | ||
| 1969 - 1974 | Chevrolet | G20 Van | ||
| 1964 - 1974 | Chevrolet | K10 Pickup | ||
| 1973 - 1974 | Chevrolet | K20 Pickup | ||
| 1969 - 1981 | Chevrolet | K20 Suburban | ||
| 1964 - 1966 | Chevrolet | Suburban | ||
| 1967 - 1974 | GMC | C15/C1500 Pickup | ||
| 1973 - 1974 | GMC | C25/C2500 Pickup | ||
| 1967 - 1974 | GMC | G15/G1500 Van | ||
| 1967 - 1974 | GMC | G25/G2500 Van | ||
| 1970 - 1982 | GMC | Jimmy | ||
| 1966 - 1974 | GMC | K15/K1500 Pickup | ||
| 1973 - 1974 | GMC | K25/K2500 Pickup | ||
| 1964 - 1966 | GMC | Suburban | ||
| 1967 - 1982 | Chevrolet | C10 Suburban | ||
| 1975 - 1982 | Chevrolet | C10 | ||
| 1975 - 1981 | Chevrolet | C20 | ||
| 1969 - 1981 | Chevrolet | C20 Suburban | ||
| 1975 - 1982 | Chevrolet | G10 | ||
| 1975 - 1981 | Chevrolet | G20 | ||
| 1975 - 1982 | Chevrolet | K10 | ||
| 1973 - 1974 | Chevrolet | C20 Pickup | ||
| 1975 - 1978 | GMC | K15 | ||
| 1979 - 1982 | GMC | K1500 | ||
| 1964 - 1974 | Chevrolet | C10 Pickup | ||
| 1975 - 1981 | Chevrolet | K20 | ||
| 1975 - 1978 | GMC | C15 | ||
| 1979 - 1982 | GMC | C1500 | ||
| 1975 - 1978 | GMC | C15 Suburban | ||
| 1979 - 1982 | GMC | C1500 Suburban | ||
| 1975 - 1978 | GMC | C25 | ||
| 1979 - 1981 | GMC | C2500 | ||
| 1975 - 1978 | GMC | C25 Suburban | ||
| 1979 - 1981 | GMC | C2500 Suburban | ||
| 1975 - 1978 | GMC | G15 | ||
| 1979 - 1981 | GMC | G1500 | ||
| 1975 - 1978 | GMC | G25 | ||
| 1979 - 1981 | GMC | G2500 |
Specs:
| Bolt Count | 12 |
|---|---|
| Bolt Pattern | GM 8.875 Truck |
| Brand | B&M |
| 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 | Raw Aluminum |
| Drain Plug Included | Yes |
| Emission Code | 5 |
| Filler Plug Included | Yes |
| Gasket Included | No |
| Material | A356.0-T6 Aluminum |
| Product Type | Differential Cover |
| Thickness (in) | 3.62 |
| Warning | California Proposition 65 |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 14 reviews
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Product Reviews
★★★★★ 4
Decent pillow; medium-firm; heavy
Style: King - Medium
I was looking to replace my old latex pillow from BBB. I have tried several but finding just the right one has been elusive. Although expensive, I was confident this would be THE one. Sadly, it isn't. For a latex pillow, this IS really nice. It is comfortable and solid latex - hard to find. It is medium-firm and has decent spring back. But for me, it doesn't have enough sink. It is actually too firm and I felt my neck was cranked all night (I am 5'6", 135#, side sleeper, ordered the 6.5" one). I do think the cooling Purple grid works pretty well but at the same time, I could feel the grid under my pillow case. The pillow is very heavy.
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Reviewed in the United States on February 26, 2026
★★★★★ 1
It’s $30 to return and quickly STINKS from body heat
Style: Standard - Medium
Original review about $30 return below, but since it cost to return I gave it to my husband. He’s a hot sleeper so other than this pillow we’ve switched to all cotton, linen or wool bedding and it’s made a huge difference. (Polyester is plastic so it reflects your heat back to you and makes you sweat more and doesn’t breathe.)
I truly would not have kept this pillow except $30 felt like a waste just to return and he got excited about it. So okay, it’s his. Well I’m the laundry queen in our household (he does all dishes) and I realized very quickly this pillow would need to be washed OFTEN. Like, once a week is NOT enough.
Something about body heat and this material smells HORRIBLE.
Washing it is obviously not easy, so I handwash the outer layer of the pillow with a very gentle soap (bought for silk). And then it has to hang dry.
It doesn’t matter. I can clean it perfectly, no smell remaining whatsoever, but after two nights, it’s so strong I can smell it JUST STANDING NEAR THE BED.
Look. I mentioned my hubs sleeps hot, sure. But he’s hygienic. This should not be such an issue. It’s never been an issue with any other pillows. The smell doesn’t even smell like him or like B.O. or anything. It’s awful and legitimately churns my stomach.
But can I throw out the stupid $200 thing? Noooo. Now he’s attached. And I’m spending hours of my life each week washing it to keep from feeling sick sleeping near it at night. And to avoid having wasted $200. Hate this thing.
DON’T BUY THIS STUPID PILLOW. Dropping from 2 stars to 1 Because of the smell.
Original review:
I thought I could buy this and see if the height would work for me. It didn’t, and pinched my neck instead. But now the *only* way to return it is to ship through UPS (not return to the UPS Store or Kohl’s or Whole Foods, which would be free).
I was going to return it and try a different size, but such a high price just to *try* it is not worth it to me.
I’ve returned much larger (defective) items in the past without hassle or cost (like an entire heavy duty garage shelf with broken pieces).
Had I known, I would not have ordered in the first place, so I hope this saves someone else.
As for the pillow itself, it was unique, but I couldn’t even really lay my head on it for more than a moment until I had let it air out for more than a week. It REEKED upon arrival. My husband said it smelled like ozone, and my brother compared it to the inside of an airplane. It burned my throat if I tried to lay on it for more than about 30 seconds at a time. Two and a half weeks later, the smell is still slightly there.
So even if it was comfy for me, I would not keep this pillow.
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Reviewed in the United States on January 31, 2025
★★★★★ 5
The best pillow for side and back sleeping
Style: King - Medium
Bought this pillow for my husband, he loves it. He is back sleeping and has been the best pillow so far. Worth the money. With buy one for me and my daughter. It’s a little pricey but when it comes to sleeping it’s worth the money.highly recommend
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Reviewed in the United States on May 13, 2026
★★★★★ 5
Best pillow ever
Style: Standard – Low
I have to say, after decades of buying all sorts of pillows, trying to work for me and my short neck, this is THE one.
I bought the low profile ones and OMG it is just perfect for me. I'm finally getting a good nights sleep without fighting a pillow that is too firm or doubling a pillow that is too soft and thin. It's also not as heavy as other memory foam pillows I've tried. I hate a heavy pillow. Yet, it isn't so light weight that it gets pushed off the bed easily if you change positions a lot during the night.
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Reviewed in the United States on May 27, 2026
★★★★★ 5
Perfect firmness
Size: Queen (Mid Loft), Number of Items: 1
This pillow is great! Not too soft, not too firm. Holds its shape.
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Reviewed in the United States on April 9, 2026