999-170-165-90 Bosch WR5DC+ WR5DC Spark Plug Fits carbureted 911 models from 1968-1971, as well as all 914-6.

Spark plug, W 5DC; for use on Porsche 911 TU (1965 to 1968), Porsche 911 T:WW (1969), Porsche 911 T (1970 to 1973), Porsche 911 and 911 S (1974 to 1976), Porsche 914-6 (1970 to 1976) and Porsche 924 (1976 to 1985)