The Edelbrock Super Victor Vortec Intake Manifolds are arguably the most popular and flexible manifolds in racing. These single-plane manifolds are found on oval tracks, in drag racing, and on NASCAR engines. Maximum horsepower and torque are needed to win races in these single-plane manifolds. This manifold is designed for racers using Vortec cast iron or Edelbrock E-Tec aluminum cylinder heads. This manifold offers the same top-end horsepower, throttle response and advanced design features as Super Victor #2925. It is designed specifically to enhance the performance of the Vortec cylinder heads (also known as L31). The #2913 is the most powerful intake available for Chevy production heads.