These XD260 head studs are the ideal upgrade for any high-performance, racing, or sled pulling application. Upgrading the OEM head bolts is a must when adding horsepower and torque to your Cummins. The factory head bolts typically can’t handle the additional pressure from high-performance applications which can lead to the cylinder head lifting. Upgrading to these XDP head studs helps to keep cylinder head locked down and avoid head gasket failures. The threads are rolled after heat-treating to deliver optimum fatigue strength. The XD260 Series head studs feature an upgraded 260,000+ psi tensile strength to ensure the cylinder head on your engine stays locked in place under even the highest combustion pressures.
In addition to the upgraded strength, replacing the head bolts with studs also allows you to obtain a more precise torque reading. A bolt gets twisted as it is tightened, so it’s reacting to two different forces at the same time. With a head stud the force gets applied to the vertical axis, resulting in a more even clamping force. Studs can also ensure proper alignment of the cylinder heads every time and provide for easier engine assembly. Unlike the OEM Torque-To-Yield (TTY) bolts which must be replaced after each use, these studs are reusable which makes them a must have for high-performance applications. These studs are manufactured in an ISO/TS 16949 quality control facility. Kit includes 12-point nuts, washers, and installation instructions. Assembly lubricant sold separately.