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Customers

Ryan

bought numerous things and all transactions went very smooth. Responded to emails within a day or less. Ryan
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Derek B.

Derek B.

Great Personalized service. Derek
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Tom R.

John--the 408 engine you built for me is outstanding. Feel free to give him my cell number and I'll happily give you a strong reference. Thank you...
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Henry T.

Henry T.

HEY! Everything is installed and car runs AWESOME! Thanks for everything, Thanks again. Henry 2000 Dodge Viper R/T 10
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Ricky H.

Ricky H.

Thanks for everything John. The headers are great !
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Bob F.

Bob F.

Plymouth 426 Hemi
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Toby W.

John, Thanks again so much. You're truly awesome.
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Darren B.

Darren B.

John,Racing flat out on the 440/533 engine over 1 season & 65 passes at 8.97@150mph 1.27 60' getting great results!!Engine is GREAT!Thanks mate!
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Troy K.

Troy K.

Thanks for all your great help with my Viper.
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Jim A.

Jim A.

Two year champion in modified tractor pulling classes named "Watch This Trick". Chrysler 426 Hemi. Thanks for the Great Service!
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Jared B.

John, You Rock! Thanks again for the great deals and speedy service. Really appreciate it. Jared Dakota R/T
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Ricky R.

Ricky R.

1937 Chevy Legends Race Car, Thanks for everything!
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Jim W.

Jim W.

Thanks for the fast parts service and Great cylinder head porting! Jim
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Taylor M.

Taylor M.

Thanks a lot John !
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Ricky J.

Thanks for all the info, you have been a great help and a credit to your company.
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Brian C.

Brian C.

I have never had any problems with John on any transaction. One of the few vendors I have never had a single problem with. Including paying overnight...
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Scot C.

Scot C.

Thanks for everything John. We will be doing business again. At Nationals 6.38 on a 6.54 dial in.
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Chris B.

Chris B. won the late model feature easily Texas Motor Speedway.
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Benny C.

Benny C.

Thanks for the Great Mopar Service !
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Andrew R.

Andrew R.

I am very pleased with the quality of the magnum deep pan, and the best part is that it really is not much deeper than the stock pan so I dont have...
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Steve V.

Steve V.

You are the only guy who I trust to do the most important thing I'll ever do to my Roadrunner, a car that means more to me than any inanimate object...
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Craig W.

Craig W.

Thanks John, So far 8 races and 8 top Five!!
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David P.

David P.

Thanks for the brake lines !
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Steve B.

Steve B.

Thanks for the help with my 426 stroker.
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Alan P.

First off, I just have to say that I have never came across a more stand-up guy that takes his time to connect with his customers and have the...
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Cometic Head Gasket Tech

Can MLS head gaskets be used with motors setup with o-rings or receiver grooves around the cylinder bores?
No. MLS head gaskets require smooth, flat and true head and deck surfaces to seal. Most of the time with o-ring setups the wire and groove fall where our gasket’s combustion seal is located; therefore, the wire will hold the gasket and not allow proper compression while the receiver grooves allow combustion gases to escape.

What surface finish is required to us an MLS head gasket?
A surface finish of 50 RA (roughness average) or finer, is recommended for a proper gasket seal. Anything rougher may conflict with the gasket design.

What head bolt/stud torque do you recommend when using an MLS gasket?
When using MLS head gaskets always refer to the manufacturer of the fastener to determine accurate torque values. Appropriate torque is critical when installing new gaskets of any kind.

Why does Cometic recommend MLS gaskets to be installed dry?
Cometic Multi-Layer Steel (MLS) head gaskets go on dry because they are coated with a sealant. Each MLS head gasket is coated with a .001" thick Viton rubber that is bonded to the outer stainless steel layers. Adding an additional sealer can hinder the performance of an MLS head gasket.

Can I order head gaskets with a different thickness and/or bore size than you have in your catalog?
Yes. Call Cometic with the engine type or Cometic standard part number (search online or in our catalog) along with the bore size and thickness you would prefer and we will create your custom gasket.




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