I believe the power is quoted in WHP also as Tom mentioned. As for the actual power, Gareth (the owner) was previously running a standard VTR box and Helix paddle clutch, so it was mapped to around 230BHP. He then went back after fitting a Refrubed VTR box with Quaife dif to around 260, and has since upped it to the 280BHP mark.
Owner is very very cautious, not only about the engine, but about the box/clutch and other bits. I can happily vouch for the car and say that it has had nothing spared, a very OCD build.
#inb4intercooleriswonky