ok here goes porting and polishing is a great performance upgrade if you dont mind a mild drop in gas milage. fro the sohc ctec my shop offers a complete head package.
port/ polish, valves, pro series valve springs, titanium retainers, 3/5 angle valve job,new valve guides, new valve stem seals, hot tank head, mill (to your spec) , ported intake manifold, ported throttle body, cam gear (skunk2), stage2 camshaft ( JG or exospeed).and reprogrammed e.c.u (programmed to match head package)the price is 1300.00-1500.00 depending on a couple of options. just an example for you
customers car. 1991 crx si baseline dyno 104hp dyno after head package 125hp.
we also offer just the pro series head at 1050.00