Cometic AMC 390/401 Gen-3 V8 .045in MLS Cylinder Head Gasket - 4.250in Bore
SKU: 70504604689

Cometic AMC 390/401 Gen-3 V8 .045in MLS Cylinder Head Gasket - 4.250in Bore

Sale price$121.50 Regular price$135.00
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Description

Cometic AMC 390/401 Gen-3 V8 .045in MLS Cylinder Head Gasket - 4.250in BoreComprised of multiple embossed layers of stainless steel with the outer layers utilizing a Viton rubber coating. Compressed operating thickness is 0. 045". Cometic MLS (Multi Layer Steel) Head Gaskets provide maximum sealing performance for todays high output engines and require no sealants. MLS gaskets are ideal for both aluminum heads to aluminum blocks and aluminum heads to cast iron blocks. They can withstand the shearing force created by the two

Comprised of multiple embossed layers of stainless steel with the outer layers utilizing a Viton rubber coating. Compressed operating thickness is 0.045". Cometic MLS (Multi-Layer Steel) Head Gaskets provide maximum sealing performance for todays high output engines and require no sealants. MLS gaskets are ideal for both aluminum heads to aluminum blocks and aluminum heads to cast iron blocks. They can withstand the shearing force created by the two materials. MLS gaskets have increased strength because they are comprised of multiple layers of stainless steel; which also creates the ability to rebound and resist corrosion. The outer layers are embossed and coated on both sides with Viton (a flour elastomer rubber based material that is heat resistant to 250 C/ 482 F). Viton is designed to meet the demands of a variety of harsh sealing environments, load conditions, and surface finishes. The center or shim layer is uncoated stainless steel, which can be varied to accommodate multiple thickness requirements.

This Part Fits:

Year Make Model Submodel
1962 American Motors Ambassador 400
1963,1967 American Motors Ambassador 880
1963,1966-1967 American Motors Ambassador 990
1968-1970 American Motors Ambassador Base
1971-1974 American Motors Ambassador Brougham
1958-1962 American Motors Ambassador Custom
1961 American Motors Ambassador Custom 400
1959 American Motors Ambassador Deluxe
1968-1971 American Motors Ambassador DPL
1968-1972 American Motors Ambassador SST
1958-1961 American Motors Ambassador Super
1966-1968 American Motors American 220
1968 American Motors American 440
1968 American Motors American Rogue
1968-1970,1978-1979 American Motors AMX Base
1966 American Motors Classic 550
1966 American Motors Classic 770
1978-1979 American Motors Concord Base
1979 American Motors Concord DL
1979 American Motors Concord Limited
1972-1975 American Motors Gremlin Base
1976 American Motors Gremlin Custom
1977 American Motors Hornet AMX
1970-1971,1973-1977 American Motors Hornet Base
1971 American Motors Hornet SC/360
1971-1977 American Motors Hornet Sportabout
1970-1972 American Motors Hornet SST
1971-1974 American Motors Javelin AMX
1968-1974 American Motors Javelin Base
1968-1972 American Motors Javelin SST
1970 American Motors Javelin SST Mark Donohue
1970 American Motors Javelin SST Trans Am
1967 American Motors Marlin Base
1971-1978 American Motors Matador Base
1974 American Motors Matador Brougham
1974 American Motors Matador X
1978 American Motors Pacer Base
1979 American Motors Pacer DL
1979 American Motors Pacer Limited
1969 American Motors Rambler 440
1969 American Motors Rambler Base
1969 American Motors Rambler Hurst SC/Rambler
1969 American Motors Rambler Rogue
1967-1968 American Motors Rebel 550
1967-1968 American Motors Rebel 770
1969-1970 American Motors Rebel Base
1967-1970 American Motors Rebel SST
1970 American Motors Rebel The Machine
1966 American Motors Rogue Base
1979 American Motors Spirit Base
1974 Bricklin SV-1 Base
1974-1983 Jeep Cherokee Base
1981-1982 Jeep Cherokee Chief
1983 Jeep Cherokee Pioneer
1974-1978 Jeep Cherokee S
1978-1980 Jeep Cherokee Wide Track
1975-1978,1983 Jeep Cherokee Wide Track Chief
1971-1981 Jeep CJ5 Base
1977-1980 Jeep CJ5 Golden Eagle
1980-1981 Jeep CJ5 Laredo
1975-1981 Jeep CJ5 Renegade
1971-1975 Jeep CJ6 Base
1976-1981 Jeep CJ7 Base
1977-1979 Jeep CJ7 Golden Eagle
1980 Jeep CJ7 Golden Hawk
1980-1981 Jeep CJ7 Laredo
1976-1981 Jeep CJ7 Renegade
1972-1973 Jeep Commando Base
1984-1991 Jeep Grand Wagoneer Base
1984-1985 Jeep Grand Wagoneer Limited
1971-1973 Jeep J-100 Base
1970-1973 Jeep J-2500 Base
1970-1973 Jeep J-2600 Base
1970-1971 Jeep J-3800 Base
1971-1973 Jeep J-4500 Base
1971-1973 Jeep J-4600 Base
1971-1973 Jeep J-4700 Base
1971-1973 Jeep J-4800 Base
1974-1988 Jeep J10 Base
1974-1988 Jeep J20 Base
1972-1982 Jeep Wagoneer Base
1982-1983 Jeep Wagoneer Brougham
1973-1976 Jeep Wagoneer Custom
1979-1983 Jeep Wagoneer Limited
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SKU: 70504604689

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Lisa Bjornstad
Louisville, US
★★★★★ 5
Perfect chair!
Size: 934-Z, Color: Blue, Size: 934-Z, Color: Blue
I have an adjustable-height desk (also purchased from Amazon) and needed a drafting chair for those times when my body gets tired of standing. This chair fits the bill and then some! I put it together myself; it took me about an hour, but would take me about half that next time, since now I know what to do (and what NOT to do!). All the parts were there; there are even spare parts (see photo). All the holes were drilled in exactly the right places, too, which isn't always the case when I buy things from Amazon (my standing desk is a great example). The chair fits me; I'm short (5'3.5"), and often the seats of furniture are too deep for me to rest my feet flat on the floor. The depth of the seat on this chair is just a little over 18 inches, and with the adjustable footrest ring, it's perfect. I don't think a tall or heavy person would fit in it, to be honest. But it's perfect for those of us who are vertically challenged. I love that it glides easily on my hardwood floors and that it turns 360 degrees. The chair comes in numerous luscious colors, so take your pick! It is very sturdy, has good lumbar support, and the seat and seat back are very comfortable. And the arms flip up, which was an absolute must when I was shopping for this chair. I got it on sale, too -- $109.00 -- and I'm delighted with this purchase.
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Reviewed in the United States on April 23, 2026
P
Verified Purchase
PenLady
Carnegie, US
★★★★★ 5
Excellent adjustable drafting chair
Size: 934-Z, Color: Blue
Excellent chair design, extremely comfortable and exceptionally easy instructions to follow making for simple assembly. Love the amply wide cushioned seat and ergonomic backrest. The height adjustment feature works perfectly as well as positioning of the foot ring . Having the ability to raise the arms is also a big plus! I highly recommend this product for attractive appearance, comfort features, functionality and operation. Really nice chair!
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Reviewed in the United States on April 13, 2026
S
Verified Purchase
Sandra
Whiting, US
★★★★★ 4
Comfortable, stylish, and perfect for long work hours 💗✨
Size: 934-Z, Color: Pink
I bought this chair because I spend a lot of time working and needed something comfortable but also stylish, and I absolutely love it. Since I started using it, I feel much better support in my back thanks to the lumbar support. It makes a big difference, especially during long work hours. The adjustable footrest is also a feature I didn’t know I needed, but now I use it all the time. The flip-up armrests are very convenient because I can adjust them depending on what I’m doing or move them out of the way when needed. The pink color is beautiful and adds a soft, elegant touch to my workspace. It looks great in a modern home office. It feels sturdy, well-made, and very stable. Overall, it’s a great purchase that improved both my comfort and the look of my workspace.
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Reviewed in the United States on April 29, 2026
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Amazon Customer
Grantham, US
★★★★★ 5
All-around thumbs up!
Size: 934W-Z, Color: Black
So far, so awesome. Easy to assemble, comfortable, arrived quickly and is exactly what I was looking for. I have a tall work bench in my new studio so I needed a chair that we could allow me to sit higher than a regular office chair and allow me to get off my feet after standing on the concrete floor. Plus its a nice looking chair that I am sure will last a long time. I love the flip-up arms and the lumbar support. This is just right!
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Reviewed in the United States on May 8, 2026
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Danielle Chen
Louisville, US
★★★★★ 5
Perfect Balance of Comfort, Support, and Style!
Size: 934-Z, Color: Black, Size: 934-Z, Color: Black
I’ve been using this chair for a few weeks now, and I’m genuinely impressed with how much of a difference it’s made in my workspace. The mesh back is one of my favorite features—it offers excellent breathability and prevents that sticky, overheated feeling you sometimes get with solid-back chairs, even after sitting for hours. The seat cushion is firm enough to give proper support but still has enough give to keep me comfortable through long workdays. It feels like the perfect middle ground between soft and supportive. The adjustable foot ring has been a complete game changer for me. I use a taller desk setup, and having somewhere to rest my feet makes a huge difference in posture and overall comfort. Whether I’m sitting upright for focused work or leaning back to read, it’s always at the right height. The flip-up armrests are another smart design choice. When I’m typing, I like to have them down for support, but when I’m done, I can flip them up and push the chair neatly under my desk—saving space and keeping things tidy. The casters roll smoothly on both hardwood and rugs, so I can move around easily without scraping the floor or getting stuck. The overall build quality feels solid and sturdy, with no wobbles or creaks. Assembly was surprisingly quick—everything was clearly labeled, the parts felt durable, and it only took me about 20 minutes from opening the box to sitting in the chair. The sleek, modern look is another big plus—it blends in perfectly with my home office décor without feeling bulky or taking up too much visual space. If you’re looking for a chair that combines comfort, ergonomic support, durability, and style, I can’t recommend this one enough. It’s equally great for work, studying, or just relaxing at your desk, and it’s definitely been worth every penny.
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Reviewed in the United States on August 12, 2025

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