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The Supertech manganese-bronze exhaust valve guide for Honda NSX applications fits 5.5mm valve stems and is specified for exhaust-side installation on NSX cylinder heads. It restores correct valve stem clearance and alignment during head repairs or rebuilds, supporting accurate valve seating and reduced stem wear. Sold individually, this guide is intended for NSX exhaust guide replacement where the 5.5mm stem dimension applies.
Supertech Honda NSX Manganese Bronze Exhaust Valve Guide 5.5mm Stem
