Check the listing for details. ACP Fresh Air Vent Duct. Condition: New. Listed at 29.78 USD. Fresh Air Vent Duct by ACP®. Flexible. For many years ACP has been in the automobile industry and has grown to become one of the leading manufacturer/distributors of Classic Mustangs. Through the years they've expanded and developed thousands of products for additional vehicles such as Bronco, Comet, Falcon/Ranchero, Fairlane, Thunderbird, Camaro, Chevelle, etc. Company has always invested 100% of their resources into each and every product they offer and they control the entire manufacturing process. They start with new and accurate tooling along with the purest raw material to ensure a quality product with superior fit and craftsmanship.