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The Supertech valve guide for Mazda MZR 2.3L engines fits 6mm valve stems and serves both intake and exhaust positions during cylinder head service. It reinstates correct stem clearance and alignment after machining or wear, supporting consistent valve movement and seating. Sold individually, this guide is intended for head rebuilds or repairs that require the 6mm stem dimension on MZR 2.3L engines.
Supertech Mazda MZR 2.3L Intake/Exhaust Valve Guide 6mm Stem
