Nitrous Oxide Plumbing Kit

What Is a Nitrous Oxide Plumbing Kit?

A nitrous oxide plumbing kit provides everything needed to route and connect the nitrous side of a performance injection system — from the bottle to the intake manifold. These kits are not complete nitrous systems themselves; instead, they supply the critical hardware — stainless steel hard lines, B-nuts, sleeves, distribution blocks, nozzles, jets, and fittings — that link your existing components together cleanly and safely. Whether you're building a direct port system from scratch or upgrading the plumbing on an existing setup, a quality plumbing kit ensures leak-free connections and consistent nitrous delivery to every cylinder.

Why Plumbing Quality Matters in a Nitrous System

Nitrous oxide is delivered under high pressure, and even minor leaks or flow restrictions in the plumbing can throw off the air-to-fuel ratio, reduce power output, or create safety hazards. Stainless steel tubing is widely preferred in performance applications because it resists corrosion, handles high-pressure nitrous flow, and holds pre-bent shapes far better than softer materials. Properly sized lines and matched fittings also ensure that each cylinder in a direct port system receives an equal, measured shot of nitrous — a critical factor for both power consistency and engine safety.

What to Consider When Shopping a Nitrous Plumbing Kit

• Cylinder count: Kits are typically configured for 4-cylinder, 6-cylinder, or 8-cylinder engines, with line quantities and lengths sized accordingly.
• Line material: Stainless steel hard line is the standard for durability and pressure resistance in most performance builds.
• System type (wet vs. dry): Dry nozzle plumbing kits deliver nitrous only and rely on the engine's fuel injectors for enrichment, while wet systems mix nitrous and fuel at the nozzle.
• Included hardware: Look for kits that bundle B-nuts, sleeves, distribution blocks, and all necessary fittings so no supplemental parts are required for a complete installation.
• Compatibility: Verify that line lengths, nozzle thread sizes, and fitting types match your existing solenoids and bottle valve hardware.

Top Brands in Nitrous Oxide Plumbing Kits

Nitrous Express is one of the most recognized names in nitrous oxide performance, offering a comprehensive range of stainless tubing plumbing kits sized for 4-, 6-, and 8-cylinder engines. Their kits — like the popular 80045 and 80085 — include pre-cut stainless tubes in multiple lengths along with B-nuts and sleeves, giving builders the flexibility to route lines cleanly through virtually any engine bay.

NOS (Nitrous Oxide Systems) is one of the pioneering brands in automotive nitrous performance, with a heritage dating back to the early days of drag racing. Their plumbing kits, including Pro Shot Fogger configurations, are engineered around direct port injection applications and are built to accommodate demanding competition environments.