Also, whatever you get, B16 or B18C, get a good header for your first mod. Don't fool around buying a cheaper header because you will find its limits quickly when you start adding cams and other things. Get an RMF or ANR something like that, spend the extra money on a top notch header then get a custom exhaust built at Mainstream and you'll be good to go until you save up for the cams and other add ons. My numbers in my sig on my b16 are on a fairly modest build. I've still got the stock throttle body, no headwork as far as Port and polish or valve job, stock rods, stock pistons only slightly larger bore, and stock crank.