GSC Power Division manganese bronze exhaust valve guide for Hyundai G4KF Theta engines, supplied as a single unit. This exhaust guide is listed for G4KF Theta fitment and is intended to replace worn guides during cylinder head service, with manganese bronze noted as the construction material in the product description.
GSC P-D Hyundai G4KF Theta Manganese Bronze Exhaust Valve Guide - Single