Ram Air Tony

iTrader: (2)

Is there a head gasket set that is thinner than stock to boost the CR a tad?? I know they exist for the LS1, but do they for the 6.0L ???

thanks in advance

RAT

xp3nd4bl3

I put some custom gaskets on mine. Ordered them from cometic. I think they're .043" thick compressed.

Ram Air Tony

iTrader: (2)

How much were they???

thanks

RAT

xp3nd4bl3

I don't remember exactly. Pretty expensive, but they're awesome gaskets and I had the made custom bore size. I think I paid around $150?

Ram Air Tony

iTrader: (2)

they got a website ??

THANKS
RAT

Ram Air Tony

iTrader: (2)

www.cometic.com

duh

1fstTA

iTrader: (25)

well Im having built right now a 423 iron 6.0 liter block and 6.0 liter heads and I bought the felpro 1041. gaskets they are 4.135 bore and .41 compressed. they better work on the 6.0 liter heads

Ram Air Tony

iTrader: (2)

stock bored 6.0 liter is 4 inch bore, right?? does felpro make one that size in a thin version?

thanks

texada

iTrader: (3)

what kind of compression will you have with this gasket? Are your heads milled?

GTBMad

Stay away from the Felpros 1041 they are rubbish blew 2 head gaskets just take a look at them and you can see they are not the real deal.

Using cometic now you can see the difference

Taspeed

iTrader: (1)

you can use the late model z06 gaskets. they have a bore sufficient for a 4.030 bore, and I've checked em in at least 3 times at .043 crushed.

Ram Air Tony

iTrader: (2)

so the LS6 gasket will suffice for the 6.0 liter bore of 101.6 mm even though the LS6 bore is 99mm??

if yes, then I guess the bore of the gasket isnt exact to the bore of the cylinder

thanks

RAT

Taspeed

iTrader: (1)

yes they have been used and are sufficient for a 4.030 bore. Its close, but it works just fine with a FATTY shot of nitrous the bore size of the gasket is always a little bigger than the hole. How much depends on the gasket maker.

BigTex

iTrader: (16)

How about a part number for those z06 gaskets?

mbaskett

actually, the ZO6 gaskets bore size is right around the 4" size, but I don't think they can accomodate a bore size above 4"... But I do use them on 3.905 bores all the time. They come out to be .047" crushed, although I've 'discussed/debated' this with Scoggin Dickey several times... the advertized crush is .065ish, but every time on the mic, they come out to .047 +-.001 Personally, I'll believe the measurments that I can actually see and check over advertised specs anyday....

The 6.0L gaskets are different than the ZO6 gaskets in that they have a larger bore, and these are the ones that can accomodate the 4.030 bore size, and probably even a 4.060 too. I haven't mic'ed a set of these crushed lately, but the last mic I did was on a set that had been preveiously crushed, and then removed from the motor, and my mic read in the .034ish range... although thats not the best/most accurate measurement method, so don't quote me on saying that's the final actual crush... I would assume it to be closer to the ZO6/LS6 gaskets thickness since they are the same design and each of the 3 layers is the same thickness and material type...

the GM part number for an idivudiual LS6 gaskets is 12573949 (they are identical/interchangeable from side to side)
The part number for a pair is 12498544

I have the pN for the 6.0 gaskets somewhere, just cant' find it at the moment...

BigTex

iTrader: (16)

I know the 6L MLS gasket is a 4.040 diameter and can handle a 4.030 bore. From what everyone says, it is a .060 compressed gasket though.

Ram Air Tony

iTrader: (2)

got the factory 6.0L gaskets, Matt and I and Chris are gonna put that beytoch together tomorrow and have it rollin in a week or so

stay tuned

RAT