These single-plane, high-rise manifolds are arguably the most popular and flexible manifolds in racing today. You'll find them on oval tracks, in drag racing, and on NASCAR engines because they boost power where these engines need it the most--from 3,000 rpm to 8,500 rpm. All Victors have extra material for port matching and are available to fit either square bore or Dominator carb flanges. All Sales are final and as is.