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Supertech manganese bronze valve guides for BMW S54 engines, supplied as a set of 12. These intake and exhaust guides accept 6mm valve stems and list a 12.03mm outer diameter, providing correct valve-to-guide fit during cylinder head rebuilds. Use them to restore smooth valve operation and maintain alignment when replacing worn guides on S54-equipped BMW engines.
Supertech BMW S54 Manganese Bronze Intake/Exhaust Valve Guide 6mm Stem 12.03mm OD - Set of 12
