New in original box Muffler Walker part number 21396.   May fit 1942 - 1948 Ford passenger vehicles 6 cyl and 8cyl.  2 " inlet offset, 2 "  outlet centered.  Case is oval 4 1/2" x 11 1/8" x 21 5/8". Overall length is 25 3/4".  Galvanized steel.  May replace Ford Part Number 51A-5230.