If he wants a 100% BOV let him get one. Its not like it kills the car or the turbo it just makes the driveability a little off. It makes the car a little laggier and you can shoot fireballs, whoopty do its all his personal preference.

Its funny how much the WRX scene has changed since the cars came out. Originally everyone was running 100% atmosphere BOVs, manual boost controllers, and shitty Unichips but now if you post up saying thats your setup you get flamed by all the OGs who probably used to run the same hardware 5 years ago. If you're going to run the HKS I'd at least do some background knowledge so you know why the stock system recircs and what you're messing around with.