if its a fiberglass body kit just get a crobar and pry it off..then find the mounting points and unscrew them..toss the body kit and put the OE bumpers,sides back on..

haha
front bumper-
There should be a screw/bolt 10mm or 8mm on each corner*where it meets the fender=may have to move the fender liner a tad to get to it.
there will be 5 push-in clips under the hood,2 on the bumper next to the headlights, 3 in the middle holding on the grille
the sides,could just be screws on the front and back (infront of back tire,behind front tire) screwed over top of OE sides..
if the OE sides are still on there..look under the car there will be 3 of those GAY "screw in push clips" pop those out, from the back tire push towards the front tire..itl pop off..itl take some force.mayb a rubber mallet.
rear-
2 bolts on the corners meeting the quarter panel.
and about 6 push in clips under the trunk lip*open the trunk and ull see them
hope that gives you a starting point to looking..thats where everything is OE so hopfully they put the body kit on the same or close to it.