Cometic GM LS1 SB 3.910 inch Bore .066 inch MLS-5 Head Gasket

Cometic GM LS1 SB 3.910 inch Bore .066 inch MLS-5 Head Gasket

Marsoni

M251S

$128.84

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

Cometic GM LS1 SB 3.910 inch Bore .066 inch MLS-5 Head GasketComprised of multiple embossed layers of stainless steel with the outer layers utilizing a Viton rubber coating. Compressed operating thickness is 0. 066". 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

Easy Shipping

Quick Dispatch:

Your Cometic GM LS1 SB 3.910 inch Bore .066 inch MLS-5 Head Gasket orders ship within 1-2 business days.

Delivery Options:

Standard: 3-7 business days
Fast: 2-3 business days
Express: 1-2 business days

Order Tracking:

You'll receive a tracking link by email once your Cometic GM LS1 SB 3.910 inch Bore .066 inch MLS-5 Head Gasket ships.

Need Help?
Questions about Cometic GM LS1 SB 3.910 inch Bore .066 inch MLS-5 Head Gasket, sizing, or delivery? We're just an email away.

Live Shipping Estimates:
Enter your location at checkout to see available shipping methods and costs for Cometic GM LS1 SB 3.910 inch Bore .066 inch MLS-5 Head Gasket in your area.

Get Shipping Estimates

Country Zip/Postal Code

Exchange/Return Notes

We offer a 30-day return/exchange service after receiving.
Final sale items are not eligible for returns or exchanges.
To process your return/exchange, please contact us at [email protected]
Please click here for more details>>> Return & Exchange Policy

Don't let my 4-star review dissuade you, as I've had to reassess prior products that initially I thought were great but then failed me in the long term. These are definitely full and plush, you might want to avoid if you prefer slightly thinner support, especially if you are a side sleeper. But so far I find them comfortable and meeting all of my expectations.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on February 28, 2026