This is a A-RE557891 Valve, Exhaust, 30? PN: RE557891Main Description As Following : A-RE557891 Valve, Exhaust; 30??? P.N: RE557891 Head Diameter: 1.417"Replaces: R502370, RE518081, R535136Stem Diameter: .276"Total Length: 5.254" Replaces: RE518081 JOHN DEERE Found in Section & Models : Engine Parts > Engine Related Parts, John Deere BACKHOE: 310K, John Deere BACKHOE: 310L, John Deere BACKHOE: 310SK, John Deere BACKHOE: 310SL, John Deere COMBINE: 1570, John Deere DOZER: 850J-II, John Deere EXCAVATOR: E210, John Deere EXCAVATOR: E210LC, John Deere EXCAVATOR: E230, John Deere EXCAVATOR: E240, John Deere EXCAVATOR: E240LC, John Deere EXCAVATOR: E260, John Deere EXCAVATOR: E300II, John Deere EXCAVATOR: E300LC, John Deere EXCAVATOR: 210G, John Deere EXCAVATOR: 210GLC, John Deere EXCAVATOR: 250G, John Deere FORESTRY EXCAVATOR: 2144G, John Deere FORESTRY EXCAVATOR: 2154G, John Deere FORESTRY EXCAVATOR: 2654G Associated Items : New Also A-JD-S-SM2046, A-JD-O-OMR51902, A-JD-S-TM1053 And : Head Diameter: 1.417" Replaces: R502370, RE518081, R535136 Stem Diameter: .276" Total Length: 5.254"