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Cometic vs GM MLS

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Old 09-06-2010, 06:19 PM
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Default Cometic vs GM MLS

Which head gaskets are you guys running? I will be running a D1SC(8psi) with GT2-3 cam on the stock bottom end(around 500rwhp)? Are the cometics worth the extra $$ over the GM MLS? I will also be using ARP head studs.
Old 09-06-2010, 07:59 PM
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rwhp in sig. I have heard good things about guys really pushing on stock mls gaskets, if im no mistaking some of the gm gaskets are 5 layer??
Old 09-06-2010, 08:43 PM
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Standard GM MLS gaskets are 5 layer. You can also go with LS9 head gaskets if your using 317 heads, their 7 layer. I've ran the standard GM gaskets the whole time I've had my car and not a single problem yet.
Old 09-07-2010, 11:31 AM
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3rd vote for the GM MLS gaskets. The Cometic are very hit a miss. You either swear by them or swear at them. Not much middle ground from what I have heard. I just put a set of Cometic’s on my buddies NA setup. This is the first set of Cometic's I have ever used so I guess I will see which swearing group I end up in. LOL
Old 09-07-2010, 11:58 AM
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go gm unless you need a special thickness, then do cometic.
Old 09-07-2010, 12:35 PM
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Are the LS9 MLS's better then the regular ones? I never heard of that so I wanna see wince I'm about to toss the heads on. Thanks!
Old 09-07-2010, 01:01 PM
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Originally Posted by smokinHawk
go gm unless you need a special thickness, then do cometic.
I second that, special thickness is the only reason we used cometic on my buddies build.
Old 09-07-2010, 02:34 PM
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Thanks guys, GM MLS it is
Old 09-08-2010, 08:20 AM
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to bring this back up real quick.

what gasket do you guys run on bigger than stock bore. like say a 4.125?

i heard the ls7 wont work the best witht he water lines. any imput would help.

thanks
D
Old 09-08-2010, 04:20 PM
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I have been using GM MLS gaskets since '03 and they are holding up well. I only push around 8-9 psi though.
Old 09-09-2010, 02:00 AM
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Looks like it will be GM MLS for me as well.....
Old 09-09-2010, 11:28 AM
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No info on the LS9 MLS? Just wondering if it is a better option then the reg 5 layer that everyone is using?
Old 09-09-2010, 11:34 AM
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Thanks guys, for what I saved on the gaskets I bought a new set of lifters.
Old 09-09-2010, 11:34 AM
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^^^^ figureing it is made for a boosted motor. i am going to say it is better. and it came out after the 5 laye. so i dont think GM would go bawards in gaskets
Old 09-09-2010, 06:44 PM
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LS9 gaskets are 7 layer. Do a search. This issue just cam up not to long ago. There was also part numbers listed.



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