NOS Dry Nitrous Spacer Plate for Holley LS Hi-Ram EFI Intake Manifolds, available Black or Silver Finish, 1-Piece Billet Aluminum dry nitrous plates designed to bolt between the upper and lower intake manifold on Holley Hi-Ram LS manifolds. Features machined passages that precisely spray into the center of each cylinder. Includes jetting for 50, 100, 150, 200, and 250 horsepower configurations. Supports up to 1000+ horsepower (jets purchased separately). Machined 0.103” passage directly into the plate that feeds eight 0.040” openings per intake runner, no worry about spray bars breaking or spinning. Includes NOS plate, gasket, jet holders, and jets.