Top ring groove up, middle groove down & oil ring can go either way. Supply the thickness of each ring to make sure you receive the correct Piston Ring Set.The HCC3802258 Piston Ring Set fits equipment brands such as: AGCO, Allis Chalmers, Case, Case IH, New Holland, WhiteThe HCC3802258 is a substitute for the following discontinued products: HCRK3802429
-The HCRK3802421 Piston Ring Set, Standard, 1 Cylinder Set fits equipment brands such as: AGCO, Allis Chalmers, Case, Case IH, Massey Ferguson, Versatile, White
-The HCRK3802429 Piston Ring Set, 9.33" Long, 5.155" Flange O.D., 1 cylinder set fits equipment brands such as: Allis Chalmers, Case, Case IH, Gleaner, International, Massey Ferguson, New Holland, White