Single Plane EFI Intake GM LS7 Single Plane EFI LS Intake Manifold Fits All GM LS Gen III Engines Equipped with LS7 Cylinder Heads HolleyDesigned with a 4150 Square bore flange. Optimized runner layout and constant cross sectional area broad torque curve, best vehicle performance from 2500 7000 RPM The manifold kit includes the fuel rails, mounting hardware, and o ring cylinder head mounting flange gaskets. Minimum carb flange height fit in vehicles with minimum hood modifications. Cast aluminum construction great manifold for centrifugal blower, turbocharged or Nos power adder