Lawnboy

iTrader: (54)

What head gaskets with 15-17 PSI ?

I have a set of the GM mls 02-04 zo6 head gaskets that are suspose to be good, I will be using ARP head studs.

I was thinking of the Cometic Phuzion LS1 boost head gaskets , they are expensive but are suspose to prevent head gasket failer in event of head lifting.

whats do you think?

Syclone354

iTrader: (6)

Id also like to hear about different head gasket options. Im going to need a set of 4.030's soon for my turbo iron 6.0...

WS6HUMMER

iTrader: (19)

X2

ninetres

iTrader: (35)

I'm trying out the new 6.2l 5 layer gm mls.

52172

iTrader: (2)

stock gaskets work fine for that boost level. The head bolts swapped for head studs are more important than the gaskets.

LS1IMPULSE

iTrader: (42)

GM gaskets. Make sure to buy MLS gaskets though.

Frost

iTrader: (45)

I have been running 15-16 psi on mine with pump and meth for 9000 miles.

Websy21

iTrader: (34)

I am going with the gm mls on my 370, 4.030 and arp studs as well

veee8

iTrader: (40)

Those cometics require a special RA finish on the deck and the heads. So fine that most shops DO NOT have the equipment or know how to nail it. When you choose a machine shop, that is something to look for. Cometics are really finnicky. I used GM MLS LS7 gaskets on mine.

ls1290

iTrader: (20)

That combo will work well

Keith

prochargedchevyi

iTrader: (9)

Finally!!! Someone else gets it... I had an argument with a guy who had put cometics on his engine, and he was leaking coolant everywhere. I told him, unless you deck your block, they're not going to sit level and they're going to leak. He didn't believe me. That's why he was on the bleachers watching ME race.

Cometics are AWESOME gaskets and it's really hard to make them distort, but they take some preparation before they can be installed. It's really a 50/50 success rate. I've seen guys do a head swap with them and they work fine - I've also seen the alternative.

The only way to be sure is to deck the block. Other than that, the GM units are very good and don't really require any special machining.

BTW - does anyone know where to get the GM MLS (other than the dealer?) My local dealer is saying $160.00/set. That seems a little high to me.

Ryan K

iTrader: (11)

Cometics here, so far so good @ 20psi.

camarols1

iTrader: (17)

Your local dealer is on crack!!!

Ask for a price on two of part number #12610046, the list price is $37.84 each. This is the 5-layer GM MLS gasket for an 6.0/6.2 engine.
Keep shopping until you get a realistic price.

prochargedchevyi

iTrader: (9)

Thanks for the PN.

Turns out the parts dept guy at my local dealership is shady as hell. He's telling me that PN is a special-order item and that in order to get them, he has to order them in sets of 5; so because of that, he has to charge me the extra shipping! WTF?!

So with shipping it'll be $112.00 for 1 set... Something is very fishy here.

Scoggin Dickey

iTrader: (34)

We can set you up

GrandmasterCow

iTrader: (5)

I have the MLS 5-layer in my car now, they work fine. I also have a extra brand new set of the MLS 3-layer gaskets from GM brand new, i got them accidently that I'll sell to you if interested, just PM me.

camarols1

iTrader: (17)

No problem man.

Yeah, I would find another dealer for sure. 5-pack my a$$....

SDPC will hook you up way below list if you can wait for shipping.

Dunn

iTrader: (20)

Werd, I work at a chevy dealership and that 5pk is pure bullshit, GM delievers gaskets all SEPERATE. They are just being dicks and trying to rip you.

I get my gaskets for $23.00

blacksi

iTrader: (3)

Did you have to have anything special done? I've got a new shortblock and new Patriot heads I'll be mounting to it.

ss_girl

iTrader: (9)

Are the new 5 layer better then the older style?