This is Chevy's best Bow Tie aluminum intake manifold for competition small-block V8s with standard intake ports. It is based on the same casting (P/N 10051103) as the raised runner intake described above, and offers the same advanced performance features. The gasket flanges are machined to provide the proper port alignment with standard runner locations; runners in heads and manifold must be matched by engine builder. This manifolds single-plane design produces impressive power at high rpm, and the tuned runners boost mid-range torque.