There after market "Flashes" for both the new Plus Six and Plus 4 engines. The Plus Six will go up to 500bhp, with ease.
As Alistair has said, the V8 is an old design and it is far harder to squeeze more out of a naturally aspirated engine than a Turbo, I understand.
I suppose if you want to make an Aero V8 a bit more lively then buy the engine from the M Sport boys, the S65, with 444bhp, if it will fit.
