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The Nitrous Express Holley Hi-Ram plenum plate system bolts into Holley Hi-Ram manifolds, injecting nitrous and fuel from the runner side to deliver direct-port-like distribution without spray bars. Single-stage jetting covers 50–500 WHP. The billet plate has internal machined passages to avoid spray-bar issues, and the system ships with billet and carbon-fiber solenoids, stainless braided lines, wiring, switches and all installation hardware, including a 12 lb bottle.
Nitrous Express Holley High Ram Plenum Nitrous Plate Kit w/12lb Bottle
