Sorry but my two penneth. The 440 to 450 claims for the V6 is maybe a little apprehensive to say the least. Maybe it is possible. Let's pull back a bit & look at the V8 which I have, not that has anything to do with it. But there is one out there running 703 BHP. Rolling road proved. The Company that do the conversion is ARDEN. They take the stock engine & fit forged pistons with fully floating con rods, a balanced crankshaft. They run the Eaton supercharger at it's full capacity of (not sure) 14,000 rpm. They change the complete exhaust system & maybe wrong but believe a Cat delete. They then change the complete engine map, which involves the ignition timing, fuel delivery rate, fuel time delivery, boost points etc, all this costs an arm & a leg. So believe what you will of the figures that are quoted for a simple chip box. A word of warning of a chip boxes is that it could improve performance but unless done on a rolling road it could have points where the fuel is weak or timing too far advanced that it could cause detonation & hole a piston or 2. Be warned. Give it a fistful from the lights & smile but do a trackday on long runs, at your peril. Is anyone going to argue this.