When it comes to designing ESM Race spherical bearing kits, we only use OEM control arms to extract our data that we need to produce our products. We have a in house CMM - Cordinate Measuring Machine to assure precise information to allow us to manufacture our kits. We use CAD programs to generate our drawings and MasterCam to machine our housings for the perfect fit and finish. So rest assure we have spent a great ordeal for our path to great success and we hope to have you as part of our journey.