if you have the money,..go with a Type R head (b18c5 head) ,...if not then go with a b16a head,..i went with a GSR head well because it was cheap,...LS/vtec is known for leaking oil,..this is due to the fact that people try to tap the head themselves or they go to really shitty machine shops to have thier work done,..find a reputable machine shop who knows what they are doing and you should be fine,...i had no oil leaks,...it produces good power,...i liked it alot but im going with another motor so im selling the head and i will be selling my LS motor when i get my new motor