Cometic Chevrolet Mark-IV Big Block V8 4.630in Bore .051 MLS Cylinder Head Gasket

Cometic Chevrolet Mark-IV Big Block V8 4.630in Bore .051 MLS Cylinder Head Gasket

Marsoni

M251S

$112.65

Get it in 3 business days with 1 day shipping. Friday, May 29

Cometic Chevrolet Mark-IV Big Block V8 4.630in Bore .051 MLS Cylinder Head GasketComprised of multiple embossed layers of stainless steel with the outer layers utilizing a Viton rubber coating. Compressed operating thickness is 0. 051". 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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Edit: Still holding proper pressure at 2-months !!! Had a slow leak where my tire went from 44psi to ~18psi over 2-3 days… Dashboard light would let me know every few days that I had a tire problem and I would inflate the tire back up to 44psi… Anyway, I used this product and filled air back to 44 psi and it’s held the pressure for a month already !!!! Be sure to deflate tire to ~15 PSI before adding the product… it only took about 30 seconds to empty the container into my tire with the tire pressure low. Very happy with this product !!!

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Reviewed in the United States on April 6, 2026

Verified Purchase

Kindle Customer

Carnegie, US

★★★★★ 5

Excellent stuff!

Style: 18oz

Used this on a Z-Trac with a flat and it fixed it and has held up for over 8 months.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on May 11, 2026