An active grille shutter system comprising: a frame with a first side and a second side, the frame has a first side facing a vehicle exterior and a second side opposite the first side, at least two opposing cross-sectional curvilinear sides (18a, 18b) that form at least part of a curvilinear opening to allow air to selectively pass through the frame from the first side to the second side; two or more vanes each having a pivot pin (30, 30') and a guide pin formed on at least one end of each of the two or more vanes, wherein the two or more vanes extend across at least a portion of the curvilinear opening, the two or more vanes being moveable between an open position allowing air to flow past the two or more vanes and a closed position where the two or more vanes substantially close the curvilinear opening and prevent air from flowing there through, wherein the two or more vanes close in a curvilinear position that aligns the two or more vanes with the at least two opposing cross-sectional curvilinear sides (18a, 18b) of the frame, and at least one vane mounting plate (26a, 26b) forming part of the frame and having a rotational aperture connected to the pivot pin (30, 30') and a curved slot (36a, 36b) connected to the guide pin of the respective pivot pin (30, 30') and guide pin on each one of the two or more rotational vanes; and a linkage bar (40a, 40b) connected to the two or more vanes, wherein the linkage bar (40a, 40b) has a round driving aperture for rotatably receiving the guide pin of one of the two or more vanes and an elongated slot rotatably connected to each one of the other two or more vanes, wherein the linkage bar (40a, 40b) transfers and distributes force needed to open and close the two or more vanes between the two or more vanes. a frame with a first side and a second side, the frame has a first side facing a vehicle exterior and a second side opposite the first side, at least two opposing cross-sectional curvilinear sides (18a, 18b) that form at least part of a curvilinear opening to allow air to selectively pass through the frame from the first side to the second side; two or more vanes each having a pivot pin (30, 30') and a guide pin formed on at least one end of each of the two or more vanes, wherein the two or more vanes extend across at least a portion of the curvilinear opening, the two or more vanes being moveable between an open position allowing air to flow past the two or more vanes and a closed position where the two or more vanes substantially close the curvilinear opening and prevent air from flowing there through, wherein the two or more vanes close in a curvilinear position that aligns the two or more vanes with the at least two opposing cross-sectional curvilinear sides (18a, 18b) of the frame, and at least one vane mounting plate (26a, 26b) forming part of the frame and having a rotational aperture connected to the pivot pin (30, 30') and a curved slot (36a, 36b) connected to the guide pin of the respective pivot pin (30, 30') and guide pin on each one of the two or more rotational vanes; and a linkage bar (40a, 40b) connected to the two or more vanes, wherein the linkage bar (40a, 40b) has a round driving aperture for rotatably receiving the guide pin of one of the two or more vanes and an elongated slot rotatably connected to each one of the other two or more vanes, wherein the linkage bar (40a, 40b) transfers and distributes force needed to open and close the two or more vanes between the two or more vanes.