It is for good reason that virtually every top professional engine builder relies on ARP Pro Series head studs for their all-out competition powerplants. Simply stated, there's not a better stud setup on the market today.
ARP studs are thread rolled after heat-treat, which gives them about 2000% (thats twenty times) better fatigue strength than those studs that are threaded prior to heat-treat. It costs a lot more to do it this way, because it's tough on tooling, but the results are well worth the extra effort. You will also note that ARP offers specially undercut studs for several engines. This procedure more equalizes the "stretch" of both studs, which makes for a more consistent clamping force - and one that compensates for head gasket compression when the cylinder heads are installed. This helps prevent blown head gaskets, and assures optimum engine sealing!
Proposition 65 Warning:
This product may contain chemicals known to the state of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
- Style:
- Stud
- Thread Size:
- N/A
- Head Style:
- Hex
- Undercut Stud:
- N/A
- Washers Included:
- Yes
- Material:
- 8740 chromoly
- Finish:
- Black Oxide
- Quantity:
- Sold as a kit.
- Make:
- Ford
- Engine Family:
- International diesel V8
- Engine Sizes:
- 6.9L/420
- Years:
- 1983-1987
- Cylinder Head Style:
- Stock configuration
