OK, guy who posted above me is an idiot.CR-VTEC engines are garbage and doing an H23 block with a H22 head is going to result in too much work/problems. Here is the real deal. I am also an owner of a 2000 Civic Si Coupe and I have also had my car for about 4 years too. Mine is not so stock though. I have modified it quite extensively to be an excellent street car. We also have something else in common...a dislike for turbo kits. That is exactly why I invested in a ProCharger intercooled/supercharger kit for my 00 Civic Si.On top of all the bolt-on mods and the cams in my B16, the ProCharger kit is absolutely phenomenal. Plus, it isn't going to kill your engine and you will retain its daily driver-ness. If your looking to keep your Civic Si, which I think you should, but you want more get-up...start looking around at supercharger kits. Superchargers are the king of drive-ability and offer superior low-end power.(By the way the 00 Civic Si redline is 7900rpm, just for future reference)