OptiTorque Patriot Series 12mm 6.6L Duramax Head Stud Kit. 01-16 Chevy / GMC
Patriot Series Head Studs are made in the USA with heat-treated and thread-rolled 8740 material with 180,000-220,000 PSI tensile strength rating. This kit is economically priced and is and exellent upgrade over the factory head bolts for stock to mild HP
Kit includes:
Forged, heat treated 12 point nuts
Thru hardened precision ground washers
Centerless-ground head studs
10286 & 10793
OptiTorque TorqueMaster Series 12mm 6.6L Duramax Head Stud Kit. 01-16 And 2017+ L5P Chevy / GMC
TorqueMaster Series Head Studs are made in the USA with heat-treated and thread rolled HSLA material, with 190,000-240,000 PSI tensile strength rating. This kit is for the common mid-range HP levels
Kit includes:
Forged, heat treated 12 point nuts
Thru hardened precision ground washers
Centerless-ground head studs
10792
OptiTorque Custom Age Series 12mm 6.6L Duramax Head Stud Kit. 01-16 Chevy / GMC
Custom Age Series Head Studs are made in the USA with heat-treated and thread rolled Double Vac Melt Custom Age Material with 260,000-300,000 PSI tensile strength rating. This kit is very high strength for high HP and boost applications
