DogBone Head Stud Kit for 2001-2016 GM 6.6L DuramaxWe are proud to announce our newest product line to the UnderDog Diesel family, DogBone Head Studs! DogBone Head Studs are rated at 220,000 PSI in Tensile Strength, which in our tests, actually tested higher at an average of 228,000 PSI! Our threads are rolled after heat treatment which provides a much higher quality thread and optimizes thread fatigue. Studs come with a broached allen head for easy and accurate height install. Vehicle Fitments LB7