jdm h22a can be found in 4th gen prelude, 5th gen prelude and 5th gen accord.
the type s h22 is from the 5th gen prelude. Comes in OBD2 loom. The 4th gen prelude h22 is obd1.
they can be interchangeable (convert dizzy plug to correct obd and TDC sensor location is different in one), but type s has different head and produces more power over the normal h22a.