This is a replacement delete cover that allows the removal of your factory A/C evaporator box and still allows the use of the heater & defroster functions. Cleans up engine compartment and at the same time allows room for engine swaps,large valve covers, etc. Covers are made in a heavy durable fiberglass with a black gelcoat. These are a bolt on installation and require no modifications to the firewall.
NOTE: This fits all 1978-88 GM G-Body Monte Carlo, Malibu, El Camino, Grand Prix, Bonneville, Grand National, Cutlass and Regal.