Designed to match Edelbrock's Elite Series valve covers and breathers, all Edelbrock Elite Series air cleaners have polished aluminum finned tops with a black matte background. There are two styles, one with the Edelbrock name and one without. Elite Series round air cleaners have an aluminum top with a durable, chromed steel base. Fits 5-1/8 inch diameter carburetor. A black anodized knurled nut and PCV adapter are included.