Team Z Motorsports offers replacement Insert Bushings for your Lower Control Arms utilizing a 3/4â€³ x 3/4â€³ Rod End. Constructed from 6061 Aluminum for high strength and lightweight. They are designed to work with 79-93 Team Z Lower Control Arms that come standard with these inserts. 79-93 Inserts require 1/2â€³ bolt hole. Proudly made in Detroit, Michigan.