All of our suspension products are designed and tested for rigorous use. They are made to our own exacting specifications, using high load Japanese three piece bearings, and strong welds. Do not confuse these products with cheap imitations that use dangerous bearings, poor quality materials and insufficient welding. Please note that when used with standard lower arms you have to notch one of the tension rod mounting holes as the angle is slightly changed. This can be easily done with a file. Do not confuse these with cheaper, inferior arms. These do NOT break, and come with a *LIFETIME warranty on mechanical arm failure and 12 months warranty on bearings.