Wow, China turbo? I bought it under the impression they were good turbos. Did think that maybe the actuator was poor. Talking to them directly they only stated that it must be a boost leak, even after telling them that I had tested all pipe work thoroughly, and that surely the only place that could leak after fitting a new turbo would be hot pipe gasket, which was newly bought. I do feel that it could pull better than the standard. Would a shoddy actuator give you the sound of wooshing leak though? I'm adamant that I will be searching for a hks actuator to eliminate it none the less. Cheers Colin, much appreciated