Sting the competition with Scorpion race series roller rocker arms. First, these fine Scorpion rocker arms are precision-crafted by high-tech manufacturing methods, and then fully CNC-machined. Race rockers offer more clearance for retainers and springs, and can easily handle .950 in. Lift and 950 lbs. Of open spring pressure. For a great finish to these superior rockers, the surfaces are micro-polished for maximum durability and anodized for additional protection, plus killer looks. Sting, but dont get stung with lesser quality; if you want more speed and are passionate about American-made high performance, bolt on a set of Scorpion race series roller rocker arms.