Citroen Xsara WRC help required

Hi all

I pulled out my pile of Heller Xsara WRC kits earlier & noticed in a couple of the aftermarket decal/resin packs a replacement rear wing with the vanes, whilst 1 a/m set also has a replacement front bumper with cutouts just ahead of the front wheels. I wasn't aware the Xsara went through an evolution across its career, to include these changes to the wing & bumper.
Can someone offer some info to confirm these changes?

Thanks

I definitely recall the Xsara getting vanes on the rear wing, about the same time as the Impreza WRC did - the result of a rule change? A quick google image dive appears to show the later Gauloises or GO!!!!!!! sponsored car with vanes and bumper cut-outs in tarmac-trim.

2003 New Zealand was I believe when the aero changes were made. The only other change I can remember was in 2002 when the changed the roof vent.