Our Elite II round air cleaners fit all popular 5-1/8 diameter carburetors and include a black anodized knurled nut. They come with a high-quality 3 pre-oiled, washable and reusable Pro-Flo Universal filter with the exclusive Pro-ChargeG?? clean strip for easy maintenance and excellent filtration. Our oval air cleaners are designed to fit Edelbrock single- and dual-quad applications and should clear HEI distributors and stock parts. They come with high-quality 2-1/2 washable, pre-oiled reusable filter for excellent filtration. Overall oval air cleaner dimensions are 13-5/8 x 7-3/16.