ARP Diesel Main Stud Kit 247-5401 98.5-03 5.9 Cummins

There are many important reasons to use ARP main stud kits, including the elimination of main cap walk and fretting, as well as protecting the threads in your engine block. All kits come complete with hardened parallel-ground washers and high quality nuts. Some applications have provisions for mounting windage trays and have specially designed standoff studs with serrated lock nuts to position the windage tray and lock it securely in place. The studs are manufactured from 8740 chrome moly steel, heat-treated in-house to 200,000 psi tensile strength, and precision J-form threads rolled after heat-treat to create a fastener that has threads 2000% stronger than others.

FITS: 1998.5 - 2003 5.9L Cummins

Please note:

Due to extra clamping force of these studs it is recommended to check bearing clearance when using these. May require machining of the main bores.

2003 Models- If your 03 Engine came with a factory girdle / block stiffner these studs will NOT work. 03 was a weird year with changes. Please not, if your engine had a factory block girdle / stiffner and you want to retain it click HERE for ARP 247-5403