the only adjustment i found was the bolts under the bonnet, there is about half a inch play with the bumper. i put the bumper in position and done all the bolts up except the ones under the bonnet i done them up loosely (so it just grips the bumper), closed the bonnet checked the gap, if it was too close i pulled the bumper out abit, if the gap was to big pushed it in abit until it looked ok.
hope this helps