wap out the factory main bolts on your 1989-1998 Dodge 5.9L Diesel 12-Valve with the XDP Main Stud Kit XD3016MS. The XDP main studs feature high-quality 8740 Chrome Moly construction that also includes a proprietary element added for upgraded strength and durability.
A tensile strength between 220K psi and 236K psi and a yield strength between 210K psi and 230K psi ensures these studs can handle the increased performance of upgraded applications. In addition, the threads are rolled after heat-treating to deliver optimum fatigue strength.
Upgrading from the OEM main bolts to studs also allows you to obtain a much more accurate torque reading. A bolt gets twisted as it is tightened, so it’s reacting to two different forces at the same time. With a stud the force gets applied to the vertical axis, resulting in a more even clamping force.
Furthermore, they provide for easier engine assembly and proper alignment of the main bearing caps every time. These studs are also reusable unlike OEM Torque-To-Yield (TTY) bolts which must be replaced after each use.
Studs are manufactured in an ISO/TS 16949 quality control facility. Included with the studs are washers and 12-point nuts. Assembly lubricant sold separately.