im sorry. the d15b1. pow stock 70 hp at 5500 rpm, heheh, not mine tho. still the same head tho. slight mods to it. but also for me to swap out the head only takes a hour or 2 anyway and I have the vtec-e head. Just need to reseat it. I am thinking of doing some of the things i did to my last silly engine, my 88 teg head. Port guide cutting, port and hone intake intake ports, and shoeshine the exhaust ports. etc..