Exhaust gasket ring, copper crush, Norton OHV singles - use BT-valve-cap-ring-Norton-513

Exhaust gasket ring, copper, Norton OHV singles, replace every time you remove the exhaust pipe. Cylinder head exhaust port to exhaust pipe gasket. Suits years 1935? - 1962+. OD: nominal 2inches; ID: nominal 1-3/4inches.
Note: Apply anti seize (Copper Eze P-CEZE0001) to the exhaust nut EVERY time. You can also use BT-valve-cap-ring-Norton-5137 - solid copper ring. Buy 2 and anneal them and alternate them. They can be re-annealed and using multiple times.
Original Part Number:
3720; A3/166, E6842 - Exhaust pipe flange washer (cylinder head)