Why We Make It When you upgrade your Polaris RZR RS1 with a big lift, bigger tires, and some extra gear, your frame will start to buckle with every bump and bounce. That™s why you need SuperATV™s frame stiffener. It adds much needed reinforcement to your frame so it doesn™t bend with all the extra weight. Go BIG With a frame stiffener installed, you can go as big as you want. Get a portal gear lift, monster tires, and whatever else you need and hit the trails and mud holes as hard as you want. With a SuperATV frame support ” made of 4.5 mm heavy-duty steel plating ” everything will stay ridged and aligned. Your RS1 won™t just be a massive lawn ornament that™s too fragile to take around the block ” your UTV will be the ultimate trail monster. NOTE: When running the Polaris RZR RS1 Frame Stiffener / Gusset Kit with the Polaris RZR RS1 Full Skid Plate , the frame stiffener will replace the front section of the skid plate.