I love all motor vtec, my gsr is going to stay n/a. valve train and cams is a great hp gain, but watch out for overpowering everything else. just know that everything you beef up has the potential to break something else. i would recommend strengthening a few other things before you go straight for horsepower, like the oil pump, fuel and air regulation, motor mounts, etc. there's nothing like finally putting some cams in just to watch your valves break or your rods flying out the oil pan.