This is a NOS exhaust valve [PRICE IS FOR ONE] for a 1958-64 Ford tractor

[4cyl D172 diesel eng.] 800,900,1800,4110D,4120D,4121D,wheel tractors.

They are TRW  part #S-2537.Listed below are the specs;

Please email questions,but give me time to respond.

Have a great day and HAPPY EBAYING!!!!

HEAD DIA.                          1 & 33/64

STEM LENTH                     5 & 49/64

STEM DIA.                          .341

SEAT ANGLE                      44