myheader tank also cracked, they have a tendancy to split around the folds/joins in them, i had one made in stainless which only cost $75NZ, looks trick and holds up sweet under high boost
hey try resetting your computer by unhooking the battery for half an hour. My legacy used to shut down into "limbo mode" where it would run 5psi, this was atributed to the knock sensor. The factory ecu in my leg couldn't handle running more than 16psi either and would cut out when overboos...
