Norton full gasket set for twins 500cc/600cc OHV Dominator 1948-63, Model 7 1948-55; 88 53-63; Model 77 1957-58, Model 99 1956 - 62.- cylinder head gasket ( joint washer)- cylinder base washer- rocker box inspection cover washer- exhaust pipe washers- inlet washers - timing cover / case joint washer