SKU: 53473385050

Cometic AMC 390/401 Gen-3 V8 .052in MLS Cylinder Head Gasket - 4.250in Bore

Sale price$119.25 Regular price$132.50
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Description

Cometic AMC 390/401 Gen-3 V8 .052in 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. 098". 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 0.098". 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
1968-1970 American Motors Ambassador Base
1971-1974 American Motors Ambassador Brougham
1968-1971 American Motors Ambassador DPL
1968-1972 American Motors Ambassador SST
1968-1970 American Motors AMX Base
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
1971-1976 American Motors Matador Base
1974 American Motors Matador Brougham
1974 American Motors Matador X
1969 American Motors Rambler Hurst SC/Rambler
1969 American Motors Rambler Rogue
1968 American Motors Rebel 550
1968 American Motors Rebel 770
1970 American Motors Rebel Base
1968-1970 American Motors Rebel SST
1970 American Motors Rebel The Machine
1974-1978 Jeep Cherokee Base
1974-1978 Jeep Cherokee S
1978 Jeep Cherokee Wide Track
1975-1978 Jeep Cherokee Wide Track Chief
1974-1978 Jeep J10 Base
1974-1978 Jeep J20 Base
1974-1978 Jeep Wagoneer Base
1974-1976 Jeep Wagoneer Custom
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SKU: 53473385050

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4.0 ★★★★★
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M
Verified Purchase
Malu buys everything
Battle Creek, US
★★★★★ 5
Last long
Love it ! Since I have a BMW this oil it’s good for it . The Price is good . Last long . No engine noise Or oil burning. Even the color looks good after 3 months.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 9, 2026
B
Verified Purchase
Brian Classen
San Leandro, US
★★★★★ 5
FRIENDLY REMINDER Don't overtighten the bolts
MUCH better than the cheap plastic OEM part, Just a reminder though, these thread into an aluminum block so be very careful to start them finger tight first, then evenly tighten both bolts to push the fitting into the chamber. If you don't, it will slightly misalign and you run the risk of stripping the threads. The one comes with the replacement o ring, and be sure to get some antifreeze on that seal prior to attempting to push it into the chamber. IT IS A TIGHT FIT, but that's what you want, so just be careful. You might also want an extra hose clamp on hand, as the one that came with this began to bend as it got tight, so I had to replace it for peace of mind. Overall, great product though.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 9, 2026
D
Verified Purchase
Dklnyc
Massapequa, US
★★★★★ 5
Strong product
Great quality
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Reviewed in the United States on March 11, 2026
S
Verified Purchase
Sebastian Benavides
Massapequa, US
★★★★★ 1
Snapped bolt
I tried putting it on my n55 from a m235i and it did not fit properly. I was in a rush to try to put it on and thought it was on properly and I thought it did. And I snapped the bolt because the bolt because it was not aligned after I looked at harder I do not recommend for a n55. do not get this cheaply made pos. I recommend getting it from fcp euro where parts will actually fit and not fail.
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Reviewed in the United States on January 1, 2026
B
Verified Purchase
Baldemarg
Whiting, US
★★★★★ 5
May not fit correctly or is difficult to fit on.
Would not advise buying. It wouldn’t fit with the o ring nor with the old one, it would only go in with no o ring. So I had to put back my old hinge and o ring. Edit: I had to add coolant to the O ring, along with somewhat forcing/prying it in in order to get it to fit flush.
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Reviewed in the United States on January 9, 2026

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