Description I.H.C.: Valve, engine exhaust (6 used per engine) I.H.C.: Valve, engine exhaust (4 used per engine) I.H.C.: Valve, engine exhaust (3 used per engine) This item is a suitable alternative for the following: 3055056R2, A3055056R2, A-3055056R2, 838047, 3055056R91, 3055056R1