Air Cleaner 14" x 4" Replacement Element Notched at Rear Fits for Oldsmobile 1951-1956 37941010Specifications: This all steel air cleaner uses an over the counter 14" x 4" replacement element. It's even notched out in the back to clear a GM HEI distributor. Fits 5 1 8" carb neck. 4 5 8" carb to top of air cleaner assembly 5 3 32" carb to top of air cleaner nut 18 1 4" wide (not a scaled down version) 17 19 32" front to back length Air cleaner nut has plain as cast finish Notched at rear for HEI distributor clearance Includes all steel housing,