Center Radiator Grille for the 991.1 and 991.2 GTS There is the option to add on a center radiator grille insert in your order, to compliment our very popular 991.1 GTS and 991.2 GTS front (left and right) radiator grilles. Made out of the same metal mesh as the left and right front grilles, these center pieces will also help protect GTS radiators from road and track debris. These grilles fit the 991.1 and 991.2 GTS models, both with and without parking sensors. To order your