the vx engine is a little more complex than that. it has the 5wire o2 sensor, vtec, and it has the exhaust recirculation valve. vtec wiring and extra o2 wire are not big deal. however the egr valve... i dont know what to do about that...run a p28??
don't waste your time or time will waste you
EDIT: I take it back, it makes the power higher according to one place. I can't find my original link but this second one double contradicts the first, so later I'll just try to find something good that agrees with someone and we'll see.