NOS Nitrous Oxide Jet

NOS Nitrous Oxide Jets: The Gold Standard in Nitrous Metering

When it comes to extracting every last horsepower from a nitrous system, the jet is the single most critical variable in the equation. NOS (Nitrous Oxide Systems) — the brand widely credited with bringing bolt-on nitrous technology to the performance aftermarket — brings the same engineering discipline to their nitrous oxide jets that has defined the brand for decades. These precision metering orifices govern exactly how much nitrous oxide and supplemental fuel reach the engine, making their accuracy non-negotiable.

EDM-Machined Stainless Steel for Consistent, Accurate Flow

NOS flare and funnel stainless steel jets are made using an EDM (Electrical Discharge Machining) process to ensure consistent, accurate flow across all jet types and sizes. This manufacturing method produces orifices with far tighter tolerances than conventional drilling, eliminating the flow variation that can compromise air-fuel ratios and put engines at risk. N2O kit manufacturers have exclusively switched to precision-machined stainless steel jets to avoid corrosion issues, and NOS has long been at the forefront of that standard.

Flare Jets and Funnel Jets: Matched to Your Application

NOS produces two primary jet styles to cover the full spectrum of nitrous applications. Flare jets are the most common jet type in NOS applications, while funnel jets are typically used in 4- and 6-cylinder Sportsman fogger, motorcycle, watercraft, and snowmobile kits. This distinction matters because the entry geometry of a jet — its shape and bore length — directly affects flow characteristics and ultimately power output.

The NOS jet lineup spans an enormous size range. The Precision SS Stainless Steel Nitrous Flare Jet series is available in sizes .014 to .125, giving tuners the granular control they need whether dialing in a mild street kit or chasing maximum power on a dedicated race build. Kit-based options include the Pro-Shot Fogger Flare Jet Pack (80 jets, 8 each of sizes 18 through 42), the Big Shot Flare Jet Pack (sizes 67 through 102), the Cheater Flare Jet Pack, and the Super Powershot Flare Jet Pack — each curated to match the jetting range of their corresponding NOS system.

Why Jet Selection Is So Critical

Although the metering jets are one of the simplest components of a nitrous system, their role is the most crucial, as they determine the amount of fuel and nitrous supplied to the engine. The size, entry shape, and length of the bore through the jets determine how much flow they will deliver, and by matching a suitable fuel jet to a nitrous jet size using a suitable ratio, the system delivers the appropriate amounts of both to achieve the desired power increase.

NOS Competition Cheater System kits, for example, come with four sets of nitrous and fuel jets — conservative jetting combinations based upon 900 psi nitrous oxide bottle pressure and 5 to 6 psi flowing fuel pressure — giving tuners a safe baseline from which to work up methodically. The importance of properly jetting a nitrous system cannot be stressed enough: whether adjusting a street kit's power level or fine-tuning each cylinder of a direct port fogger system, you need to have the correct jets on hand.

A Legacy Built on Precision

It is conceivable to say that nearly every significant performance milestone with nitrous was done with the NOS brand, and race reports show that the NOS brand still powers more racers than all others. That heritage flows directly into NOS jets — components engineered to perform at the track and hold up under repeated use. Whether you're replacing worn jets, retuning for a power level change, or stocking a complete jet assortment for back-to-back dyno pulls, NOS offers the depth of selection and manufacturing quality that serious nitrous builders depend on.