ARP Main Stud Kits

Thoroughbred Sku #: ARPMAINSTUDS

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$316.00 - $487.37


Product Details

Product Name: Main Stud Kit
Manufacturer: ARP
Application: Most Diesel Trucks

There are many advantages to using 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.

ARP recommends the use of main studs over bolts whenever possible for several key reasons. First is the ability to obtain more accurate torque readings because studs don't "twist" into the block. All clamping forces are on one axis. By the same token, there is less force exerted on the block threads, which contributes to improved block life (very critical on aluminum blocks). Finally, there are factors of easier engine assembly and proper alignment of caps every time.

ARP Main Stud Kits Feature:

  • Obtains more accurate torque readings over bolts
  • Eliminates main cap walk and fretting
  • 8740 chrome moly steel
  • 190,000 tensile strength
  • Heat-treated and thread-rolled
  • Some applications have provisions for mounting windage trays
  • Includes hardened parallel-ground washers and high quality nuts


  • is this kit for both heads or just one

    brandn legg | 3/9/2021

    Not for heads, these are main studs. For heads you will use head studs.