| Combustion Chamber Volume | 55cc |
| Fitment | Vehicle Specific |
| Cylinder Head Type | Standard |
| Deck Thickness | .750in |
| Emission | N/A |
| Engine Make/Size | Jeep 4.0L |
| Engine Make/Size | Jeep 4.2L |
| Exhaust Port Locaiton | Stock (1991-98) |
| Exhaust Valve Diameter | 1.50in |
| Exhaust Volume | 77cc |
| Finish | Cast Aluminum |
| Guideplate | N/A |
| Intake Valve Diameter | 1.91in |
| Intake Volume | 144cc |
| Preparation | Bolt On (Not Required) |
| Pushrod Diameter | N/A |
| Rocker Stud | N/A |
| Spark Plug Fitment | 14mm x 3/4 reach, gasket seat |
| Type | Complete |
| Usage | Street/Hi-Performance |
| Valve Angle | 10deg (stock) |
| Valve Guides | Manganese Bronze |
| Valve Spring Diameter | 1.26in |
| Valve Spring Max Lift | .540in |
| Valve Stem Diameter | 5/16in |