stock head gasket

[jwatso8]

what boost pressure does the stock head gasket and bolts let go?

[peobryant]

Some go at 35psi, others go at 60psi. You can retorque the stock bolts to hold more boost, but not everyone has good luck with that.

[KTA]

When head gaskets blow also has a LOT to do with timing and exhaust back pressure. IE smaller turbines and housings blow at less boost pressure than big ones. Most will hold 30-35psi regardless if things are right.