SKU: 38268353857

Cometic AMC 290/304/343/360 Gen-2/3 V8 .040in MLS Cylinder Head Gasket - 3.810in Bore

Sale price$115.20 Regular price$128.00
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Description

Cometic AMC 290/304/343/360 Gen-2/3 V8 .040in MLS Cylinder Head Gasket - 3.810in BoreComprised of multiple embossed layers of stainless steel with the outer layers utilizing a Viton rubber coating. Compressed operating thickness is 0. 040". 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 0.040". 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
1967 American Motors Ambassador 880
1968-1970 American Motors Ambassador Base
1971-1974 American Motors Ambassador Brougham
1968-1971 American Motors Ambassador DPL
1968-1972 American Motors Ambassador SST
1966-1968 American Motors American 220
1967-1968 American Motors American 440
1967-1968 American Motors American Rogue
1968-1969,1978-1979 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
1971-1977 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
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
1971-1972 Jeep J-100 Base
1971-1972 Jeep J-2500 Base
1971-1972 Jeep J-2600 Base
1971-1972 Jeep J-4500 Base
1971-1972 Jeep J-4600 Base
1971-1972 Jeep J-4700 Base
1971-1972 Jeep J-4800 Base
1972 Jeep Wagoneer Base
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SKU: 38268353857

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4.4 ★★★★★
Based on 29 reviews
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Product Reviews
A
Verified Purchase
Amazon Customer
Alexandria, US
★★★★★ 5
Work as well as the NGK's
Bought for a 2016 Mazda 6, I had NGK's in it for 5 months and had misfires, didnt have the money to throw more NGK's at it for troubleshooting. Bought these to try and they work great so far.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 29, 2026
C
Verified Purchase
Christopher D. Bodirsky
Alexandria, US
★★★★★ 4
Faulty plug? Otherwise great set
Definitely better than the old plugs that probably had 80k miles on them. The one star off is because I had a misfire after installing. Not sure if I damaged the plug or what, but a reinstall didn't fix the misfire. In my genius, I rushed to try to gap it and ended up breaking the iridium tip. Put the old plug into cylinder 3 (where the misfire was) and it was fine. Gonna have to get a new single tomorrow at my local shop, but a bit frustrating to get a misfire after install.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 27, 2026
B
Verified Purchase
Britincali
Birmingham, US
★★★★★ 5
Upgrade from OEM
After seeing a quite ludicrous $403 quote to change 4 spark plugs in a Mazda3 I decided to show my son how easy it is. These were an upgrade from OEM parts. They were gapped perfectly for the car. They took 20mins to fit and work fine.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 11, 2026
A
Verified Purchase
ANDRES FIGUEROA
Massapequa, US
★★★★★ 5
Very good
The best quality. Runs like new again.
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Reviewed in the United States on March 12, 2026
A
Verified Purchase
Ale
Charlottesville, US
★★★★★ 1
garbage spark plugs
misfired after 30 minutes of driving cylinder 4 misfire code, left me stranded on the highway with baby in car. “(9621)” at the end of description is a lie, was not compatible with my vehicle even with compatibility test.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 17, 2026

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