lol An integra with a V4... wow what a rarity. (they are inlines not Vs.)

If money really isn't an issue I wouldn't even swap it with the B18c1 or 5... I would just go with the B18C. The JDM one. The engine is about 4k and the vtec on it SCREAMS.

if you don't really feel like swapping run about 12psi of boost on the current engine It will definitly give you some extra speed. I don't know if it will be the BMW just because i don't know enough about them.