This unique, patented design provides the most adjustability and best clearance of any arm available for the classic Tri-Five Chevy applications. Sold as a pair, these forged steel adjustable arms come with ball studs that are 1/2" taller than stock to improve camber curve. Dial in some caster combined with t he ability to adjust camber, yields a truly 'modern' feeling suspension. The ball joints are greaseable and fully rebuildable. Additionally, OE length and 1/4" extended studs are also available to fine tune ride characteristics and maximize specific suspension geometry. Consider combining upper control arms with available lower control arms to complete the transformation of any Pro Touring, Track Ready, or daily driven street use American Muscle car. Sold as pairs. US Patent No. 9,751,370.