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Customers

Robert A.

Dude you are badass, no one and I mean one has made me feel better about getting work done then you and I appreciate that. thanks a million
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Kyle M.

Kyle M.

John, I am very pleased with the brake conversion. The kit was very easy to install and I didn't have any problems and look very good as...
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Steve B.

Steve B.

Thanks for the help with my 426 stroker.
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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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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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Daryl S.

Your 408 runs like a dream. I think we are well over the 400hp side, a new 300hp mustang could not overcome, it is a beast. I am very happy with the...
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David C.

Southeastern Performance has my vote. Thanks again!
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Michael W.

Michael W.

After getting all the compatible stuff shes a beast! Michael
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Mitch C.

Awesome work! Glad I went with you guys! Anyone I know of that wants to build I'll send your way! Thanks John! Your the man!! Mitch
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Ian A.

Ian A.

I wanted to thank you for all your help and support, for being so patient and for being a good, honest person and especially so professional....
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Harold R.

John, Thanks for the great customer service! Harold
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Ryan

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

Colton H.

"Johns the man, bought a 410 package from him years ago after I got back from overseas. The caveat I gave John was that it had to pass Californian...
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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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Michael D.

I just wish there were more guys like you around for us gen3 guys. Most just want a sale and don't care to actually help let alone give advice or...
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Marko T.

Marko T.

Hi John! Thanks again for the great service! Marko T. Finland
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Robert S.

Robert S.

426 Hemi Cuda
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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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William K.

You do outstanding work man. My whole crew is ready to see your work in action ;-)
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Felix C.

How awesome is this! This superb service is exactly on point w/what everyone have raved about. Thank you, Felix
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Derek B.

Derek B.

Great Personalized service. Derek
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Shaine D.

Wow! Thank you for that quick and informative response. Must be why you are always recommended. Shaine
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Robert S.

Robert S.

Great parts and service! Robert
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William K.

William K.

Well your service is amazing if you want my opinion. Never had better from any company I've ordered from. William K.
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Bruce P.

Bruce P.

You’ve got a big fan in me. Oh yeah, the car is awesome. Runs like a raped ape. So thanks a lot !
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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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