These ARP High Performance series head bolt kits are tough! They are rated at 170,000 psi-15 percent stronger than Grade 8 fasteners. They come available with hex heads or reduced wrenching 12-point heads that eliminate the need for valvetrain removal when re-torquing cylinder heads.
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:
- Bolt
- Thread Size:
- N/A
- Head Style:
- Hex
- Undercut Stud:
- No
- Washers Included:
- Yes
- Material:
- 8740 chromoly
- Finish:
- Black Oxide
- Quantity:
- Sold as a kit.
- Make:
- Chevrolet
- Engine Family:
- Chevy small block Gen III/IV (LS-based engines)
- Engine Sizes:
- 4.8L/294-6.0L/364
- Years:
- 1997-2003
- Cylinder Head Style:
- LS1
- Cylinder Head Style:
- LS6
