Valve Seat
| 4.6L | Valve seats width-intake | 0.075-0.083 inch |
| Valve seats width-exhaust | 0.075-0.083 inch | |
| Valve seats angle | 44.51-45.01 degrees | |
| Valve seats runout (T.l.R.) max | 0.0010 inch | |
| 5.4L | Valve seat width-intake | 0.0512-0.0591 inch |
| Valve seat width-exhaust | 0.0827-0.0748 inch | |
| Valve seat angle | 45.00-44.50 degrees | |
| Valve seat runout (T.I.R.) | 0.00098 inch |