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Which head gaskets for nitrous build.

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Old 12-02-2008, 08:47 PM
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Default Which head gaskets for nitrous build.
which gaskets should i go with for my ls1. I blew both head gaskets on a 150 shot a couple weeks ago. I had ARP head bolts but we think the gaskets just werent up to par. any suggestions.?
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Old 12-02-2008, 09:48 PM
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I'm very happy with my cometics haven't had any problems running 10# of boost. They are a bit pricy though.
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Old 12-02-2008, 09:58 PM
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I use stock GM MLS gaskets. Gaskets blowing is a sign of to much timing on the spray..
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Old 12-02-2008, 10:29 PM
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What about copper gaskets? How do they do when compared to the stock MLS?
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Old 12-03-2008, 07:01 AM
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I use the GM MLS gaskets with copper spray, and never had any problems
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Old 12-03-2008, 07:37 AM
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Originally Posted by BOTTLEFEDLS1Z
I use stock GM MLS gaskets. Gaskets blowing is a sign of to much timing on the spray..

I have a tune on the car that backs the timing down 9* @ WOT, so idk...
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Old 12-03-2008, 07:41 AM
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Cometics are awesome if you want to spend the money, but on 150 shot there is no reason why you should be having problems with GM MLS gaskets. Sounds like you may have another issue going on.
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Old 12-04-2008, 06:00 PM
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I was told to get stock GM MLS gaskets for an 02? mines an 01... anyone know why?
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Old 12-04-2008, 06:16 PM
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Originally Posted by 273sunsetZ
I was told to get stock GM MLS gaskets for an 02? mines an 01... anyone know why?
I wouldn't know what would be different about them. As far as i knew it was the same part number regardless of year.

http://www.thunderracing.com/catalog...vid=3&pcid=227

Item number 20-12589226 is what i ran before.
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Old 12-04-2008, 08:19 PM
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Originally Posted by 273sunsetZ
I was told to get stock GM MLS gaskets for an 02? mines an 01... anyone know why?
They said that because the MLS gaskets came into play in 2002 on lsx motors.

Some 01-back use the graphite gaskets that are weaker for spray. Hope this helps
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Old 12-04-2008, 08:25 PM
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Originally Posted by vetteboyc5
They said that because the MLS gaskets came into play in 2002 on lsx motors.

Some 01-back use the graphite gaskets that are weaker for spray. Hope this helps
Ah didn't realize that. Its been years since i had my 99 apart and changed them over... forget what it had.

I think if the OP goes with that part number i posted above he will be fine.
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Old 12-04-2008, 11:55 PM
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I think 99 and earlier have the notches on the deck of the heads in which you have to run graphites unless you want a machine shop to weld that notch in and cut the head. I hear the factory mls gm gaskets are great.
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Old 12-05-2008, 07:03 AM
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Originally Posted by AutomagicLS1
I think 99 and earlier have the notches on the deck of the heads in which you have to run graphites unless you want a machine shop to weld that notch in and cut the head. I hear the factory mls gm gaskets are great.
I never had to do that on my 99... ran MLS gaskets...
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