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NOS NOS now offers innovative 1-piece billet aluminum dry nitrous plates designed to bolt between the upper and lower intake manifold on Holley Hi-Ram LS manifolds. These sandwich-style plates give you an easy way to add nitrous oxide to your Hi-Ram equipped LS engine. Our plates are machined from billet 6061-T6 aluminum, laser engraved with NOS logo, then anodized for great looks and excellent corrosion protection. Our 1-piece plate features machined passages that precisely spray into the center of each cylinder. Plate includes jetting for up to 250 horsepower but is capable of supporting 1000+ horsepower. The plate is made from billet aluminum with passages machined directly into the plate so there is no need to worry about spray bars breaking or spinning.