well moose, i would get the hood scoop and spoiler first.

my reason being that the roush front with stock spoiler doesn't look right, plus the lines of the fascia wouldn't flow with the v6 rear bumper or side skirts. BUT, the roush front with the bullit grill would look cool i think.

so I would say this order:

-roush hood scoop
-roush spoiler
-gt take-off side skirts
-roush fascia w/bullit grill

happy modding!!