Rear Lower Bumper Valance (HY1195121C) by Replace®. CAPA Certified. Primed – Ready To Paint. PP Plastic. A bumper valance, also known as an air dam or rear spoiler, is a panel located below the bumper, usually installed for decorative or aerodynamic purposes. If your bumper valance sustains damage, you can pay the high price for a replacement part at the dealer, or you can save money and get a Replace bumper valance. Replace has quality replacement bumper valances that are identical to original equipment (OE) for much less than the OE price.