Keep things to herself? That to me translates to " It's all Bullshit" This is all of course nothing personal about the owner, just want to understand how it is possible.
I have spoken to a customer of mine today who I know very well and is based at the Hethel Engineering Centre in Norwich, he used to work at a certain car manufacturer based 1/4 a mile futher down the road.
He just laughed and when I read the spec out. He said to me that one thing alone proves it is not what it seems. Thats the throttle body. To get anywhere near 240bhp N/A you would in reality need a full set of throttle bodies, AND head and cam work. He said this would not guarantee well over 200bhp but you would be on the right heading.
He also said in his opinion that with the mods listed, he would expect a decent 160/170bhp if it was a good engine.
All I would say, that if there is some amazing thing they have done to get this from a 2.2 then I would love to read about it.
