This will reinforce the upright section of the weak factory spindle and help prevent bending or breaking out on the trail. If you wheel your FJ Cruiser, hard, you need these gussets. Although other manufacturers sell similar gussets, the exclusive All-Pro design is the only one that allows you to retain your factory sway bar for safe handling on the road. Welding is required for installation. Donít get stuck out on the trail with a damaged spindle!