If you are wanting to keep your 6.6L Duramax on the road for the long haul, you need to replace your head bolts with upgraded head studs.
The Gator Fasteners Head Stud Kit is a must have in any high performance 2001-2016 GM 6.6L Duramax. To overcome head gasket failures that can occur in diesel engines in these high performance applications, Gator Fasteners has introduced heavy-duty head studs for the popular GM LB7, LLY, LBZ, LMM, LML Duramax powerplants.
These studs are rated at 220,000 psi tensile strength, and provide the clamping force required to keep cylinder heads from lifting due to higher combustion pressures.
Features:

Replaces Factory Head Bolts
Chromoly steel 12 point nuts
220,000 PSI Tensile Strength
Diesel 2001-2016 Duramax
6.6 Liter
Steel
Powdercoat Black
Kit