Executive order
D-592
Hurley Engine Services Company, Inc.
Vehicle applications
No vehicle applications were preserved for this order.
Part records
| Part number | Model/specification | Modification | Remarks |
|---|---|---|---|
| 1987 through 2005 model year Jeep vehicles equipped with a 4.0 liter engine, and 1976 through 1991 model year Jeep vehicles with 4.2 liter engine equipped with a Mopar Fuel Injection Conversion Kit (Executive Order D-265-21). | The 4.0/4.2L Aluminum Cylinder Head is designed as a direct replacement with the following specifications: Intake valve diameter, 1.91 inches, exhaust valve diameter, 1.50 inches, and a combustion chamber volume of 57 cc. The stock rocker arms can be reinstalled without any modification. |