Section 17 (5.7L Engine (Service Information)): Cover-Structural: Description
WARNING: This page is about a different car, the 2006 Dodge Magnum, 2006 Dodge Charger, and 2006 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
The structural dust cover is made of die cast aluminum and joins the lower half of the transmission bell housing to the engine. The LX uses an integral one piece aluminum oil pan/structural cover.