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The Supertech exhaust valve guide for Mitsubishi 4G63 series engines is specified with a 6.6mm stem size and suits that engine family. Intended as a replacement guide, it supports consistent valve travel and helps preserve sealing in refurbished heads. Confirm engine subtype and stem clearance before fitting to ensure compatibility with your 4G63 cylinder head.
Supertech Mitsubishi 4G63 Series Exhaust Valve Guide 6.6mm Stem
