Nitrous Express Service Kits

About Nitrous Express (NX)

Nitrous Express, widely known by its NX logo, is one of the most respected names in the nitrous performance world. Founded in 1996, the brand was born out of a racer's frustration with the limitations of existing nitrous technology. Rather than adapt someone else's design, NX started from a blank sheet of paper — engineering every component with performance-first thinking already built in. That founding philosophy still drives the brand today.

At the heart of NX's reputation is a commitment to precision manufacturing. Nitrous oxide injection system kits from NX are not assembled from off-the-shelf parts; the company CNC-machines its own high-efficiency, low-turbulence valves, jets, and solenoids in-house. Each system is calibrated on a sophisticated flow bench that mimics real-world nitrous and fuel delivery conditions, so every horsepower rating is dyno-proven at the wheel before a kit ever leaves the factory.

A cornerstone of NX's engineering edge is the Lightning series. The proprietary “Lightning” bottle valve features a single 45-degree turn in its flow path, eliminating the harsh restrictions found in most competitors' designs. This means more consistent liquid nitrous delivery to the solenoid — and more power per pound of nitrous than competing systems. Lightning solenoids extend this philosophy, with an integrated purge port that eliminates the air pocket between the purge valve and solenoid orifice for immediate, reliable activation every time.

To complement its injection kits, Nitrous Express offers a full ecosystem of supporting hardware. Their nitrous oxide bottles are engineered to the same tight tolerances as the rest of the NX lineup, while the nitrous oxide controllers — like the programmable Maximizer series — give racers precise, progressive control over nitrous delivery based on time, RPM, or vehicle speed. For competitors who need reliable fuel supply separate from their factory system, NX's electric fuel pumps are integrated into their SAFE (Stand Alone Fuel Enrichment) system, a self-contained fuel cell solution that eliminates pressure drop at the fuel rail without requiring OEM fuel pump upgrades. Rounding out the lineup, multi-purpose switch panel kits keep cockpit wiring clean and controls accessible, a natural companion for any serious nitrous build.

In 2018, Nitrous Express acquired Snow Performance, broadening its footprint into water-methanol injection technology. Together, the NX and Snow Performance teams continue to push the boundaries of power-adder technology for both automotive and powersports applications. Whether you're building a street/strip machine or a full-race competitor, NX offers a complete, factory-calibrated system ready to deliver results right out of the box.

Why Choose Nitrous Express?

• USA-made quality: The vast majority of NX components are produced and assembled in the United States.
• Flow-bench calibrated: Every system is tested and tuned before it ships, with accurate at-the-wheel horsepower ratings.
• CNC-precision hardware: Proprietary valves, jets, and solenoids are machined in-house for consistent, low-turbulence flow.
• Complete ecosystem: From injection kits and bottles to controllers, fuel pumps, and switch panels, NX covers every aspect of a nitrous build.
• Proven on the track: NX systems have powered record-setting runs across drag racing, powersports, and street performance applications.