i cant seem to find any gaskets for a 3.78 bore besides stock gm gaskets, which is what i have on it now. used the arp pro series head bolts which apparently was a big waste of money because im pushing water anyway. would studs and gm gaskets be ok for 12 lbs of boost?

 

Cometic offers custom head gaskets for any bore size and any desired thickness. Call them up and get some custom made for ya.

 

ok i plan on buying arp studs... question is what kind of head gaskets do i need? just buy another set of stock mls head gaskets? or use felpro or cometic

 

im looking into using gm ls9 gaskets for my turbo buil with arp studs.

 

but the ls9's will be too big for my 5.3 wouldnt they? also im turbo'd if that helps. i lifted a head and wouldnt like for it to happen again.

 

im gonna use on a 3.78 bore also. but 4.8 motor.
the h.o. 5.3 3.78 bore uses 5.7 gaskets where the gasket bore is easily over
.150 bigger.
i plan on up to 20psi with oe heads and arp studs.

 

wow. lol so they'll fit no proplem?

 

yup,
the 5.3 l33 come with 5.7 gaskets from gm.
ls9 should work also, and were designed for PSI

 

well the only thing id worry about is overlap on my heads and cylinder bore.

 

im using 5.7 241 heads with ls9 gasket

 

well im ust trying to make sure they'll fit before i buy them. im running on a tight budget.

 

its hard to beat the factory gm mls. the cometic is nice though. with both in hand the cometic and factory mls are fairly close in design. depending on what thickness you need would be my deciding factor.

 

?????? i have no idea.... what would be acceptable?

 

head studs are a must with high boost or high n2o apps. if i were you, i would run these, cometic C5475-051, 3.910 MLS / C.O.T. - .051" . just my .02

 

stupid question but is that 90.47 just for one gasket?? or is it both of them

 

That's each. I think Scoggin Dickey and TSP have them for around $150 pr.

 

would factory mls head gaskets and studs hold my 5.3 at 12 psi?

 

i was told that with arp studs, the factory mls gaskets would hold for boosted/n20 apps. i have even been told i could double them up if i wanted, to lower my comp ratio.

 

well i may just try to use factory gaskets because this setup is just temporary untill i can buy a forged rotating assembly. so studs and factory gaskets it is. what do they need to be torqued down too? i think the reason they are lifting is because i only took them to 75 ftlbs.

 

ok. stock head gaskets and bolts just doesnt want to work for me. so im buying studs and gaskets. im putting ls6 heads on my 5.3 would these gaskets be a good choice? i want ab 9.0-9.5 compression still. cometic C5475-051, 3.910 MLS / C.O.T. - .051"