Description
ARP head studs replace the factory torque-to-yield head bolts with reusable, precision-made studs that deliver higher, more consistent clamping force. They are the go-to upgrade for keeping the heads sealed and preventing head-gasket failure on modified, high-boost or rebuilt diesels. Studs thread into the block by hand, so all torque is applied on one axis for accurate preload, and the block threads are spared from repeated bolt cycles.
ARP part number: 247-4207
Application: Cummins 4BT 3.9L
Material: ARP Custom Age 625+ superalloy (approx. 260,000-280,000 psi tensile strength)
Fitment
- Cummins 4BT 3.9L
Features
- Made in the usa
- Nuts & washers included
- Minimum 260,000 psi tensile strength
What's Included
- Head studs
- 12-point nuts
- Hardened parallel-ground washers
- ARP assembly lubricant
ARP installation instructions & torque specs (PDF)
Always follow ARP's published torque values and use the supplied ARP lubricant for accurate preload.
