The Alston Top Sportsman/Pro Anti Roll Bar is one of the strongest in the industry. Made from 2" x .250" wall DOM tubing, giving you the strength you need for those 1000+ horsepower cars. The rocker arms are welded in a double shear configuration, 6" center to center mounting. The link tubes are made from 6061 T6 aluminum, and are threaded left and right for fast and easy adjustments. The mounting cups have bushings machined to exact tolerance's and never need grease. Each Alston Top Sportsman/Pro Anti Roll Bar comes with spherical Aurora Bearing rod ends, 3/16" mounting tabs and grade 8 bolts.