Nitrate exhaust valve are made of 8645 heat treated valve steel.
Fits:
EL 1936-1940
FL 1941-1947
UOM: EA
Country Of Origin: TAIWAN
OEM Cross Reference: 18081-36,165-36
Accessory Items: 16-1728 – Pushrod Cover Clip Tool
Measurement: Overall Length: 3-7/8 inches