Pro Series rear lowers use a mix of 3/4″ heim joints and uniball pick up points with an ultimate static load rating of 27,019 lbs. All bearing mounting points eliminate bushing compliance in suspension movement, while offering infinite range of adjustment. DOM tubing construction with laser cut support plates suspend the shock mount, offering easy access to shock adjusters. Stainless Steel mis-alignemnt spacers offer lifetime of service. Stiffer than factory arms to support high horsepower applications and help reduce wheel hop.The top choice of solo and road racers alike.