B16B if you got it like that, it is a bit pricey but if I was going to spend around 4k for that then you mine as well go get you a JDM B18C (ITR) and get a little more bang for the buck. Of course you can just make one if you really want one. Just get a B16a and put CTR internals in it. The PR3 head is identical, just need a mild port and polish job with CTR cams OR '00 ITR cams because they are the same.