4" Chrome Deep Dish Air Cleaner 1 + 2 Barrel Carbs with 2 1/16" and 2-5/8" Neck | eBay
Amazon.com: 2 Barrel Rochester Air Cleaner Base - Smooth Radius 3" Neck for Increased Airflow and Power - Compatible with 2GC Rochester Carburetor - Accepts Standard 14" Element - 1 3/4" Tall Overall : Automotive
Camaro Air Cleaner Assembly, Most Small Blocks With 4 Barrel Rochester Or Quadrajet Carburetor, 1967 | Camaro Depot