Valve, Intake/Exhaust
| Bore diameter insert counterbore diameter | Intake | 1.8542 in. MAX |
| 1.8532 in. MIN | ||
| Exhaust | 1.5645 in. MAX | |
| Valve head diameter | Intake | 1.57 inch |
| Exhaust | 1.30 inch | |
| Valve face runout limit | 0.002 in. | |
| Valve face angle | 45° | |
| Valve stem diameter (STD) | Intake | 0.2744-0.2752 inch |
| Exhaust | 0.2740-0.2748 in. | |
| Over size | Intake | 0.289-0.290 inch |
| Exhaust | 0.289-0.290 inch | |
| Intake | 0.304-0.305 inch | |
| Exhaust | 0.304-0.305 inch |