well i bought this crx, and it has the sohc zc motor. and it actually feels like it pulls harder than the stock crx si motors. but i was wondering if there's any easy things i can do for more horsepower. I already got a cold air intake, still working on the exhaust. Im just trying to add a little power, not throw away my life savings. And can i throw a vtec head on this/and if so what would i need? and if so, which set up is better the z6 or the y8, and which intake manifold?