World Products 8.1L engine blocks are direct replacements with all the OE fitments and accessory mounts. The 8.1L engine is no longer in production—and until now, there have been no replacements available. These engines are common in trucks, motor homes, marine, and industrial applications. Like all of World’s blocks and heads, the 8.1L is American-made. New digital inspection equipment and quality verification procedures ensure dimensional accuracy—and mean you can be assured of total quality and superior performance.