This carburetor air cleaner center nut is the large Chevrolet "Bowtie" shape, and features the black Chevy Bowtie logo center with a red outline. Manufactured from high quality die cast aluminum material and has a great looking chrome finish. Center nut works with both 1/4-20 and 5/16-18 thread studs. This is an officially licensed GM Performance Parts product. Sold individually. Backed by a limited 30 day factory warranty.