Adjustable center Link inserts have tapered or Straight-thru designs. Tapered inserts have a 1.5" per foot taper and are commonly used with stock type inner tie rod, while Straight-thru design are for use with a 5/8" bolt and rod end. The key to success in a car building project is access to high quality, reasonably priced parts that get the job done right. Each Allstar part is the result of our dedication to research and development. Once a need is established, parts are designed and manufactured by talented craftsmen, many of whom are racers and hot rodders themselves. Many Allstar Performance parts are one-of-a-kind; you won't find them anywhere else