Hi there I own a 97 subaru impreza wrx. I inherited from my dad who passed. He always wanted to put a bigger turbo on it and get it mapped. So I'm going to do it. Just wondering what is a safe power to go to. I've heard people mention that gearboxes can go on them. It's decated. Got an intercooler, uprated cold air feed and walbro 255 pump. Im getting 550cc injectors and a bigger turbo. I was thinking hybrid my td04 or getting a 20g td05. If anyone else has other turbo ideas I'm happy to hear them. Just dont want to be spending a £1000 just on a turbo lol. Not that rich. Just looking for general advice on safe bph and things I should be checking out for when doing these upgrades. Thank you in advance.