Quite a lot! Stroked to 4.6, top hat liners, pocketed pistons, stage 3 ("Monster") head porting with larger valves, fast road cam, intake manifold ported, intake trumpets shortened and widened, throttle body ported, lightened and balanced flywheel, heavy duty clutch. I have already upgraded the injectors to Bosch ones and have the Tornado ECU re-map.
Aiming for around 290-300bhp. I've spent quite a bit, but luckily with my own workshop, I don't have to pay any labour charges!
If you compare it with a 3.7L roadster, I think it looks really really good value for money...and will sound better!
