The Ford 6.2 Boss High-Ram Lower Intake Manifold With Holley Flange Pattern accepts any Top Lid with a Holley HiRam Flange pattern. This allows you to utilize the many Fabricated, Cast, and Billet Lids already on the market for the Holley HiRam. The Manifold is Cast Aluminum with a tapered style runner for optimal air flow and has multiple threaded Sensor ports on the bottom of the plenum. This manifold uses stock ford 6.2 intake manifold gaskets. This Manifold WILL NOT work with the alternator in the factory location. Alternator MUST be relocated.