The Chevrolet Performance Air Cleaners are manufactured from high quality materials for durability and a show stopping appearance. They have been designed to keep the dirt out of the engine while also allowing plenty of air to easily pass through for maximum horsepower and reliability. Design 14 round classic-style air cleaner has chromed lid with embossed Chevrolet name and Bowtie attaching nut. Fits most four-barrel and two-barrel carburetors.