Please check the engine code on the integra before you buy it. It is a 1995 LS so it should be B18B1. The engine code is located on the left side on the engine, below the distributor. I do not think that the guy knows what is he talking about, and one thing for you to remember, DO NOT BELIEVE ANYTHING A SELLER TELLS YOU, even if it is FAMILY (cousins and stuff, not like parents).

Should be 16 valves, four per cylinder. If you had 18, you would have 5 valves in 2 cylinders, and 4 valves in the 2 other.