Supertech black-nitrided intake valves for the BMW S50B30 Euro version are offered as a set of 12 and listed specifically for that European S50B30 configuration. The nitrided finish is called out and the set provides intake-side replacement valves sized to fit the S50B30 Euro cylinder head applications.
Supertech BMW S50B30 Euro Version Black Nitrided Intake Valve - Set of 12