Upgrade the strength and durability of your Polaris RZR with the High Lifter Front Sub-Frame Stiffener Gusset Kit. Designed to provide extra strength at weak points on the frame, this kit features a 3D notch-and-tab design that greatly improves frame stiffness and overall strength. Reinforcing the a-arm mounting positions and preventing tabs from stretching, it is the perfect addition when installing portals, big lifts, or bigger tires. Crafted with 3/16 inch or 4.5mm thick heavy-duty steel plate, this complete bolt-on kit includes 10.9 grade hardware for easy installation. Prevent frame flex at key mounting points and enjoy a durable, clean finish with the powder coating. Give your off-road adventure the strength it needs with this essential upgrade.