Main Stud Kit 1998.5-2007 Dodge 5.9L Diesel (Without Girdle) XDP Xtreme Diesel PerformanceGet the XDP Main Stud Kit XD3012MS and enhance the bottom end of your 1998. 5 2007 Dodge 5. 9L Diesel. This main stud kit is manufactured from high quality 8740 Chrome Moly and incorporates a proprietary element for added 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 your application. In addition, the threads are