oil cooler, not needed
oil reservoir,why?
cams, Standard cams will be fine
cam pullies,why ?
pullies crank and supercharger,
bigger injectors,
better airflow, (I was thinking putting CBR throttle bodies with a 1.8 20v fuel rail or a just a 1.8 20v throttle body) As for airflow, the standard manifold is fine, the G40 one want fit, neither will the 20v fuel rail, due to different bore spacing.
4 2 1 manifold bigger diameter exhaust,
blow off valve/dump valve, Dont use a blow off, modify the G40 bRV to fit
EGT gauge,why?
oil pressure gauge,
boost gauge,
turbo timer, why, no turbo, so need for a turbo timer?
stand alone ECU,
You haven't done much research have you?
You need pistons with lower CR and stronger rods