NOS Nitrous Oxide Plate

NOS Nitrous Oxide Plate Systems: Precision Power for Every Build

When it comes to bolt-on horsepower, few solutions are as elegant — or as proven — as a nitrous oxide plate system. Rather than relying on complex forced induction or extensive engine teardowns, a nitrous plate slots directly into the induction path, delivering a precisely metered shot of nitrous oxide and fuel at the push of a button. And when it comes to nitrous plates, few names carry more weight than NOS (Nitrous Oxide Systems).

NOS pioneered the automotive use of nitrous oxide in the 1970s, and the brand's plate systems represent decades of real-world refinement. Race reports consistently show that NOS powers more competitors than any other nitrous brand — a testament to the reliability and performance repeatability that serious racers demand. Whether you're chasing bracket times on the drag strip or simply want a reliable power reserve for spirited street driving, NOS plates are designed to deliver.

A Plate for Every Intake Configuration

One of the strongest aspects of the NOS nitrous plate lineup is its breadth of fitment. NOS offers nitrous injector plates for both carbureted and EFI applications, with options spanning 4150 and 4500 flange configurations, as well as sandwich-style plates engineered specifically for Holley Hi-Ram and Sniper intake manifolds. This means whether you're running a classic square-bore four-barrel carb, a modern throttle body EFI setup, or a purpose-built LS swap intake, there's a purpose-designed NOS plate for your combination.

The sandwich-style plates — designed to bolt between the upper and lower sections of compatible intake manifolds — are a particularly notable engineering choice. NOS constructs these plates from billet 6061-T6 aluminum with passages machined directly into the plate itself, eliminating the spray bars found in older designs that could break or spin out of position. Each plate feeds eight precisely sized openings per intake runner, ensuring even nitrous distribution across all cylinders — a critical factor in engine longevity and consistent power delivery.

Wet and Dry Configurations, Built-In Tuneability

NOS plate systems are available in both wet and dry configurations, giving builders the flexibility to match the system to their fuel delivery setup. Wet plate systems introduce both nitrous and supplemental fuel simultaneously — ideal for carbureted engines or EFI setups where simplicity and standalone fueling are preferred. Dry systems, which rely on the engine's existing injectors to supply additional fuel, are well-suited for EFI builds with tunable engine management. Plates are typically jetted to cover multiple horsepower configurations — from as low as 50 hp all the way up to 250 hp — while the billet plate construction itself is capable of supporting significantly higher power levels for builders who plan to upgrade over time.

NOS plate kits typically ship as complete systems, including Pro-Race nitrous solenoids, brackets, hoses, jetting hardware, and a nitrous bottle — everything needed to go from unboxing to first pass with minimal fabrication required. This plug-and-play philosophy has long been a cornerstone of the NOS brand's appeal, making sophisticated power additions accessible to builders at every experience level.

The Right Plate Makes All the Difference

Choosing the correct nitrous plate involves matching flange style to your intake manifold, selecting wet or dry delivery based on your fuel system, and choosing a jetting range appropriate for your engine's strength and tune. NOS's plate systems take the guesswork out of many of these decisions with clearly defined fitment, proven solenoid hardware, and comprehensive instructions. For any performance enthusiast looking to explore the nitrous oxide plate category, NOS remains the benchmark against which other systems are measured.