NOS Nitrous Oxide Blow Down Tube

NOS Nitrous Oxide Blow Down Tubes: Race-Proven Safety Hardware

When a nitrous bottle is mounted inside a vehicle's passenger compartment, a reliable blow down tube isn't optional — it's a critical safety component. NOS (Nitrous Oxide Systems) has been the industry's most trusted name in nitrous performance since the late 1970s, and that same engineering philosophy carries directly into their Nitrous Oxide Blow Down Tube lineup.

What a Blow Down Tube Does — and Why It Matters

NOS Racer Safety Blow-Off Adapters and Blow-Down Tubes are designed to relieve pressure due to a rise in ambient temperature or heat soak within a nitrous bottle. If a nitrous system creates too much pressure due to a rise in temperature or heat soak, a bottle could rupture and cause serious physical harm. The blow down tube acts as the final line of defense, safely routing nitrous discharged from your blow-off cap to the outside.

Beyond personal safety, these tubes are a regulatory requirement at the track. Safety adapters are for use with Gen II and Gen III Hi-Flo and Super Hi-Flo nitrous bottle valves and will allow the pressure to bleed off through a diffuser cap and vent tube which exits outside the vehicle — and both NHRA and IHRA require these blow-off adapters and tubes when racing a vehicle with nitrous oxide.

NOS Blow Down Tube Construction and Fitment

NOS 90-degree bend nitrous bottle blow down tubes are made from 1/2" 6061-T6 aluminum and available in blue or black anodized finishes. This aerospace-grade aluminum alloy keeps weight low while providing the corrosion resistance and durability demanded in high-heat engine bay environments. These aluminum tubes mount along the side of your nitrous bottle, so they don't get in the way.

This type of tube is necessary when mounting a nitrous bottle inside the passenger compartment of a vehicle — it directs the nitrous outside of the vehicle in the case of an over-pressurization event, and the 90-degree bend may be necessary for some nitrous bottle installations. NOS offers configurations to handle a range of routing challenges, available in multiple styles and finishes to suit both street and dedicated race builds.

Why Trust NOS for Safety-Critical Nitrous Hardware?

It wasn't until the late 1970s when two racers perfected nitrous oxide's use — and the company Nitrous Oxide Systems (NOS) was born. During the first several years, NOS spent most of its resources demonstrating that nitrous oxide was an efficient, safe form of performance enhancement — and the effort paid off, as NOS quickly became known for producing easy-to-install kits made from the highest quality material available. That commitment to quality and safety extends to every component in the NOS catalog, including blow down tubes.

Both the first 200 mph run and the first 6-second run were aided by NOS, cementing the brand's reputation at the highest levels of motorsport. A brand that has been trusted with record-breaking performance builds is a brand you can trust with the safety hardware protecting those same builds. Explore the complete NOS brand catalog or browse all Nitrous Oxide Blow Down Tubes to find the right fit for your application.