High Quality: 100% Brand new polished aluminum raised finned air cleaner with Paper filter and aluminum base. Size: Air Cleaner oval in shape and measures approximately 12" L x 8 1/4" W x 4" H. 2" tall paper filter element. Parameter: Inner diameter 4 15/16'' ,outer diameter 5 1/8". Advantage: Comes with a stainless mounting bolt. This nostalgic-style air cleaner features raised fins along the top. Fins are Polished and As Cast in Between the Fins. Compatibility: Compatible with 5 1/8" opening to fit most carburetors. Compatible with Chevy Ford. 12" Air Cleaner Kit Polished Aluminum Classic Nostalgia Oval Fully Finned Compatible with Classic Chevy Ford 5-1/8” Carb Holley Edelbrock