The Edelbrock Elite Series Oval Air Cleaner is designed to fit Edelbrock dual-quad carburetors. These oval air cleaners clear HEI (Heat Energy Ignition) distributors and stock parts. They come with a high-quality 2.5 inch washable, pre-oiled cotton gauze filter for excellent filtration. The top material is made of aluminum with a natural finish and the base material is made of steel with a chrome finish. To keep the engine clean, replace the original filter element in the Edelbrock air cleaner with a new element every 3,000 miles.