I could be wrong, but I don't think so. The Tempest was a K11 facelift model and I'm assuming that since your talking about removing the grille you have a pre-facelift model (the facelift K11's grille was built into the bonnet itself).
I beleive that if you wanted to change it, you would need to replace the wings, headlights, etc.
yea a tempest is 2001 onwards and a facelift...it is possible but like gam1984 said you need facelift headlights,frontwings and front bumper because the headlights dip into the bumper
Thanks for the replies, i had a feeling the headlights would be a problem i had no idea it would require the swap of all the front panels, maybe i will just stick getting a tempest replica grille on my LX.