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The Supertech manganese-bronze valve guide for BMW S54 engines fits 6mm valve stems and features an outer diameter of 12.03mm for intake or exhaust installation. It restores valve-to-guide clearance and alignment during head rebuilding or repairs, ensuring stable valve movement and seating. Supplied as a single guide, it is intended for applications that match the S54 stem and bore dimensions.
Supertech BMW S54 Manganese Bronze Intake/Exhaust Valve Guide 6mm Stem 12.03mm OD
