K&N Oval Style Stacks for Kinsler - Siamese Stacks - Air filters are designed for use with the Kinsler fuel injection system for Pontiac and Chevrolet small block V8. Air filters come with removable top plate, to install, push injector tubes through rubber base and clamp at desired height. Oval top plate is 9-1/8L x 5-1/2W. Total height of air filter is 6-1/4. K&N Injector Stack Air Filters come in a variety of shapes and sizes to meet multiple needs. As with all K&N air filters, these are washable and reusable. Simply use K&N oil and cleaner to service your filter.