Edit: Assuming youre looking to swap the Evoke bumper to an S1 SS/SV6 style bumper
The Series 1 SS/SV6 Bumper will fit right over. I think however you may need different wheel arch liners, thought his maybe for Series 1 to Series 2 Conversions? You will need to replace all the grilles however, as they are different between the too. You'll also need the Chrome (Or Black) grille surrounds
As an alternate, consider doing an Evoke International conversion. You can keep the bumper, and just upgrade it to have the DRL's, gives it a MUCH better look for the least outlay. Id also go the additional set of painting the grill mesh in proper "Phantom Black" paint. They left it as unpainted plastic on Evokes which looks horrid after being in the elements.