This 4.6L engine, identified by the 8th VIN digit '9,' is adapted for use with compressed natural gas (CNG), making it an eco-friendly used engine option. The naturally aspirated V8 setup offers steady performance, while the CNG-specific injection system provides optimal fuel distribution for cleaner combustion. Its SOHC configuration is designed for durability, particularly under the unique demands of CNG fuel use, making it ideal for those seeking an environmentally friendly, reliable used engine with robust performance characteristics.