Hello!
Which type of GR.N Impreza you plan to make? Version5?
If I know well the Ver5. has only 2 door in rally stages, but the imprezza has a lot of version in roads. I think the STI was homoligated always(/lot of time) for a GR.N car in Europe.
Ver1.
There is a wrx saloon car, what I see in GrN
in Greece [GC8A48D, MakeYear1993 OR GC8B48D, MakeYear1994]
And the other Ver1. car was the WRX STI [GC8B48D, MakeYear1994]
It has a very big wing, now not find picture from a GRN car, but I remember a photo.
Ver2.
WRX STI [GC8C4ED, MakeYear1996]
It has a medium high wing,
Ver3.
WRX STI [GC8D4ED, MakeYear1998]
The front grill changed, maybe the front lights too. The shape of the bonnet, and the air-intake holes on the bonnet.
Ver4.
WRX STI [GC8E4ED, MakeYear1999]
It has a bigger wing. The front bumper holes changed, 2 holes instead of 3.
Ver5.
WRX TYPE R STi[GC8F2DD, MakeYear1999]
This is a 2 door version. The front grill and maybe the front lights changed.
A Greece Car
http://iceal.wikidot.com/subaru-impreza-gc8-wrx-nVer6.
WRX TYPE R STi[GC8G4ED, MakeYear2000]
I don't remember to see a GrN car from Ver6.
V5 and V3:
If you plan to make a V1-V4 version, I think it is possible to make only one sgc with switchable bonnet, bumper, front grill, wing, mirror, maybe 2-3 type of wheel.
If you make a V5 version, I suggest use the 2-hole bumper, and the bigger V4-V5 style wing. But sometimes (after a crash) lot of drivers use 3-hole front bumper and old wings on his V4 or V5 car. More over, there was a car in Hungary which is V2 but it has a big V4/V5 wing.
On the other hand lot of GrN impreza has a GrA style mirror is it possible to use both on your car?
I hope it will have a smaller wheel
We try to do a GrN car only for a render, but don't have time to make it correctly, front grill, mirror and wheels changed, and the wing(from a wrc), but not looks good, because of the different front lights and bonnet.