Really depends who you talk to on here IMO, so will say yes, some will say no, personally I say yes it's ok, took mine off again yesterday, sounds MILES better, but what you have to realise it that it could potentially shorten your turbos life as it is essentially forcing air back through it. I have already destoyed a turbo not long after doing this, and i am convinced it was a factor, although admittedly it wasn't a new turbo. I think the important thing is that you are aware of the "risks" and make the decision for yourself.