apart from the gay flame kit it looks a good engine.

as for power output......all depends on what management it's running and how well it's set up etc. from what i've read, running on the 803 injectors they max out at about 380bhp, most run them at a safe 350bhp and change for greys if you're going for a higher output.

oh and ditch the 4x4 intercooler and stick a RS500 spec one on there