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Cometic GM Gen II/ Mark IV BB 4.630in Bore .040in MLS (396 / 402 / 427 / 454) Head Gasket

Marsoni M251S
Sale price$107.98
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Cometic GM Gen II/ Mark IV BB 4.630in Bore .040in MLS (396 / 402 / 427 / 454) Head GasketComprised 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
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
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kentdb
Boise, US
★★★★★ 5
Definitely worth it.
Glad we did this it was easy and worth it.
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Reviewed in the United States on April 11, 2026
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Rick
Bozeman, US
★★★★★ 5
Very fast.
Very responsive, I was impressed.
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Reviewed in the United States on May 5, 2026
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D. G. Atkinson
Omaha, US
★★★★★ 4
Vaccuum
Does not work well on deeper pile carpeting. Does not have an adjustment to raise or lower the beater bar . Good on hardwood floors or tile.
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Reviewed in the United States on May 8, 2025
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Diana McAdams
Pawtucket, US
★★★★★ 5
Easy peasy
Easy claim process
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Reviewed in the United States on April 22, 2026
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Tubia
Houston, US
★★★★★ 5
Peace of mind knowing your covered
Asurion protection plans are worth the peace of mind!
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Reviewed in the United States on April 1, 2026

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