Edelbrock 3704 Performer T.B.I. Intake Manifold Provides outstanding throttle response and increased torque Basic operating RPM is from ideal to 5,500 RPM;Will not fit Caprice or Buick and Cadillac "B" bodies Plenum and base material is made of aluminum with a natural finish Accepts all OEM equipment and small-bore (1-11/16") throttle body injectors only Performer intake is 50-state street legal, when used with the correct carburetor and in the correct application