Turbo XS is the cheap EBAy ones im pretty sure, my mate had the black one and got rid of it, didnt even hold 12psi
You should just go for a Turbosmart Type 2 V-port if you want an atmospheric bov
Im using a GFB hybrid bov with 2 adapters, 1 for plumb back and 1 for atmos or you can leave both on and have half half