if u want billet grille, there should be some companies around that will make if for you as long as u provide the exact demensions, and it shouldnt cost much, the mustang one will be too small for a g4
found a company that can make u a billet grille as long as u send them one in.. AIM 1-800-289-9980
mail is... 260 south hibbert. mesa, arizona 85210
i think its through Chassis Tech. give that number a call for more info. they might have a website.