ok the only reason that a jrsc is only for 97+ has nothing to do with the engine, but rather the engine bay. if a 5th gen prelude owner happened to get an h22a1 or jdm h22 for whatever reason, they could still use the supercharger cause they have the room. but it wont fit in a 4th gen lude or any accords. 1 person has actually fit it into a 4th gen lude, so maybe theres hope, but the cost of everything necesary to do is not worth it.