ok the kid who the car before ran 15 psi blew the head studs out the first time then he put arp head studs in it blew those out once again runnin 15 psi on a shaved head he put the stock ones back in , he sold the car to another kid this kid ran like 12 psi blew the studs brought it to his mechanic he put studs in it . Then he sold it to the kid whoe has it know,its got a exhaust leak more then anything. But the head is ticking so rather then go through all of the trouble of fixing the head hes just going to get another that isnt shaved so he can run 15 psi no proublem. Sorry philly i had to say it, i proubly know more about his dsm then i do mine i dont know whoes ive been under more, lol