Side louvers, gills, or grilles, all names for the lower panel just to rear of front wheel, available in press molded fiberglass. This Left Hand 1967 Corvette Side Louver Panel, fits where the original panel was and has the correct one-year only louvers. This panel has the extension that reaches forward over wheel well and connects with the parking light panel.
Learn more from the following Mid America Motorworks Knowledge Library article:
Corvette Body Components from Fiberglass to Resin Transfer Molding