First i had a jdm vti head on and that leaked real bad so I then put my d16z6 head on and it still leaks but not as bad. I am using my d16z6 dizzy "bought it new" thougt that was the problem but i was wrong $180 down the drain. The JDM head felt like it had alot more power then the d16z6 head. I dont have the over heating problem people say they get it seems to run cooler. So far I put 400 miles on it and runs real good. It lacks power when i shift it to second but i still need to tune it. If can't fix the leak im just gonna look for a d16z6 block.