The JHR Spherical Bearing Kit for 2005 to 2011 Ford Mustangs is CNC machined from billet aircraft grade aluminum. Purchase the highest quality suspension products right here at JHR. Our spherical bearing kit for the 8.8" Ford Mustang rear is precision machined to strict tolerances so that our customers will be completely satisfied with their purchase from JHR. This kit is suitable for all types of racing use but if used on a street driven vehicle there will be a signicant increase in road noise (NVH). We do, however, use a teflon lined commercial grade spherical bearing to minimize friction and wear from constant load and motion. We ONLY use AMERICAN MADE bearings in our kits. We strongly believe there are some places where saving a buck is not worth the risk. With our highly qualified staff of designers and machinists we are able to bring our customers a value that most other companies can only dream about. The entire staff at JHR is on a mission to be the best. As with all JHR manufactured parts this one has a lifetime replacement warranty. See warranty details on our website.