A question for the re-mappers maybe...

I've currently got a '97 STi running around 330-340bhp and i'm looking at putting it back to standard... or very close to standard.

Current Spec:

Fully Forged 2ltr
APEXI ECU (remapped)
3" Exhaust & Downpipe
VF22 Turbo
Ported Headers and Uppipe
550cc Injectors
FMIC
FPR and Uprated Fuel Pump
K&N Induction Kit

... now, i'm wanting to know if I remove the following:

APEXI ECU
3" Downpipe
Ported Headers and Uppipe
550cc Injectors
FMIC
K&N Induction Kit

Leaving on the VF22 Turbo, Exhaust, FPR and fuel pump... and then refitting the standard ECU, Headers and Uppipe, 440cc Injectors and Airbox with panel filter.

Will the car run okay with it being fully forged, and having an exhaust uprated fuel pump and FPR but running on the standard ECU (not mapped)??

Thanks for any replies, much appreciated!

 

Anyone?