smokinponcho73

iTrader: (6)

ok I am about to buy 6.0 head gaskets from the chevy dealership will these work on a 408 with unmilled 243's? I want to stay with stock gasket size
Thanks Brandon

fossil

iTrader: (1)

I used Fel-Pro multi layer steel gaskets # FEL 1161L&R for my 408.

Dave88z

Whats the bore size and compressed thickness?

fossil

iTrader: (1)

bore size for 3.946" to 4.100" compressed thickness .053" compressed volume 11.5cc.

99blancoSS

iTrader: (115)

12589226 is the 5.7 MLS gasket and its about 4.060 bore and .052 thick or so.

12589227 is the 6.0 MLS gasket and its about 4.060 bore and .052 thick or so.

Or the

12610046 is the 6.2 MLS gasket and its about 4.100 bore and .052 thick or so.

You just dont want any gasket in the chamber exposed to combustion

smokinponcho73

iTrader: (6)

hey chris do you know what size the bore is on the 408?

99blancoSS

iTrader: (115)

4.030
go with the 4.100, Scoggins had good prices on the GM and Cometics, do you want me to get them for you and just put them in the crate? Save a few bucks on shipping.