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LS2 Multi Layer Steel MLS Head Gaskets

cander24

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Hi All,

So it looks like i've blown a head gasket in my LS2. Its mildly modified with a big cam, higgins cnc'd heads, mafless tuned etc. Now my question is, to those that have build modified LS2's what have you used and recommend for head gaskets??? In any perfomance build ive done (mainly supercharged V6's) Ive always used stainless MLS gaskets (ACL Race Series Proseal) with excellent results, however I have heard that the factory machined finish on the LS2 heads and block is not fine enough for a proper seal of aftermarket MLS gaskets and that im better off using the GM MLS???
Are the Genuine ones up to the task of a modified build? That's what its built with now and they've failed after 60k kms (losing coolant out the exhaust).

Thanks,

Chris
 

Munz

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Powertorque used genuine MLS when they installed my 243's

You could go for cometic, yanks seem to use them quite a bit
 

SirNemesis

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Not all MLS gaskets are created equally. I've heard stories where some of the 'higher quality' Cometic gaskets don't seal on LS engines, and this would no doubt be due to the 'raw' finish on the block deck and heads. But, given the cost and complexity of machining these to suit, it might be not worth the hassle. I've always used genuine gaskets on mine as I believe there is a higher margin for error on finish quality. I'm currently using LS9 gaskets, but I have also had the block deck and heads machined to a mirror finish first (even though I'm confident they'd seal fine without it). I've previously used LS1, LS2 and LS3 genuine MLS gaskets. If you are going to buy them, buy them from the US. The price difference is almost 5:1.

If they are good enough to hold 25psi+ in a turbo application, they'll do everything you need + more in a naturally aspirated car. Just make sure the surfaces are clean!
 
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