U are asking $25 a piece for a valve that's made in Argentina... I'm looking for stainless exhaust valves if you could be very flexible on your asking price.
Old thread, but you would be surprised at who's and where most valves are made. The plant in Argentina makes a lot of valves for various labels, Cummins, Caterpillar, and quite a few other mainstream manufactures, I buy a few hundred Inconel valves a year from them (large bore engines) and the workmanship and material quality is impeccable.