A friend of mine has an 03' WRX. He has a boost controller and turboXS bov. He was running 18psi and recently he has only been seeing 12psi on the gauge. I haven't been able to go look at the car yet, but I am thinking his turbo is trashed. He has never had the intercooler off so I'm I wouldn't think it's a leak. He said he turned the boost down to 12psi and it will spike to that, but will not hold. My only other thought is the gasket between the turbo and up-pipe is bad. Any thoughts on this would be appreciated. Thanks.