Product Description:
This 16-piece rocker arm stud set is intended for compatible non-adjustable GM LS valvetrain applications. The studs use 8740 chromoly steel, M8 x 1.25 cylinder-head threads and 5/16-24 upper threads for the supplied nuts.
| Producer | ARP |
|---|---|
| Product type | Non-adjustable rocker arm stud kit |
| Application | Compatible non-adjustable LS Gen III / Gen IV rocker-arm assemblies; LS7 excluded from this listing |
| Material | 8740 chromoly steel |
| Condition | New performance part |
| Quantity | 16 rocker arm studs with nuts and washers |
| Engine / assembly | Required configuration |
|---|---|
| LS Gen III V8 | Compatible non-adjustable rocker assembly and matching stud dimensions |
| LS Gen IV V8 | Compatible non-adjustable rocker assembly; LS7 excluded |
| Aftermarket rocker assemblies | Verify dimensions and rocker manufacturer's requirements individually |
Select by the installed engine and component configuration. Vehicle year alone does not establish compatibility, particularly after an engine swap.
- 16 rocker arm studs
- Companion nuts and washers
The cylinder-head thread and rocker assembly must match the kit's dimensions. This application follows the manufacturer's non-adjustable rocker-arm installation procedure. LS7 applications are excluded from this listing; verify aftermarket rocker arrangements individually.
| Base thread | M8 x 1.25 |
|---|---|
| Upper thread | 5/16-24 |
| Installed height | 1.460 inches |
| Upper thread length | 0.500 inch |
| Screw-in depth | 1.100 inches |
| Quantity | 16 studs; companion nuts and washers |
- Inspect the studs and clean the cylinder-head threads before assembly.
- Install the studs hand tight, then install pushrods and rocker arms using the applicable factory service procedure.
- The kit-specific instruction sheet specifies Ultra-Torque on the stud threads and nuts, then 25 ft-lb on the nuts in the factory tightening sequence. Follow the current instruction sheet supplied with the kit.
What threads install into the cylinder head?
The base uses M8 x 1.25 threads.
What is the upper nut thread?
The upper thread is 5/16-24 and uses the companion kit nuts.
Is this an adjustable rocker conversion kit?
The manufacturer identifies the installation procedure as non-adjustable rocker arm stud installation. Match the actual rocker arrangement before ordering.
Does this listing cover an LS7?
No. LS7 is excluded from the verified application offered here.
Which torque procedure applies?
Use the current kit-specific instructions. The reviewed sheet specifies 25 ft-lb on lubricated nuts with the factory sequence.
If outside the lower 48 states please email us for a shipping quote: Orders@Hawksmotorsports.com
