They provide excellent reliability in an environment or high spring pressures and roller cams. These valves are ideal for use in both drag and circle track racing. To manufacture these valves they use their exclusive two step slow forging process using EV8 stainless steel on both intake and exhaust valves. They provide special heat treatment and stress relieving process, along with hard chrome stems, friction welded hard tips and finished with a swirl polished head. The valves feature flow improvements, to deliver the power needed for today