For some reason my car isn't making full boost. Car is stock 2004 WRX besides a Perrin catback. I'm only getting 10psi in any gear at WOT. There are no boost leaks and all vacuum lines have just been replaced and restrictor pill IS in the line at the correct spot. I'm kind of at a loss of what to make of this. I'm not sure if 10psi in any gear would be a symptom of a bad BCS or not? Is there any test that can be done to confirm that my BCS is still working correctly? The only other thing i could think of is that my boost gauge is way off (prosport electrical). Unfortunately i don't have any other way to monitor boost so it's difficult to determine what to do. Any advice or input would be appreciated!