Nitrous Express Systems & Parts

What are the best nitrous kits for a Nissan 350Z, 370Z, G35, or G37? Vehicle-specific dual-nozzle systems rated for your horsepower goal — the 35-150 HP adjustable kits with 15 lb bottles give the widest tuning window and longest spray time, while 5 lb bottles suit lighter, occasional use. Always pair the kit with proper fuel delivery support and RPM-based activation.

N2O breaks down to release extra oxygen while cooling the intake charge. The result is an instant power increase — one of the most affordable ways to add a large amount of power to VQ-powered Z and G cars.

What to look for: a horsepower range that matches your internals (start low and work up with jet changes), bottle size for how often you spray (15 lb bottles mean far fewer refills than 5 lb), a purge system to clear vapor from the lines before a run, and an RPM window switch so the system only activates in the safe rev range. Fuel delivery is the other half of the equation — the engine needs matching extra fuel for every shot of nitrous, which is why complete kits include solenoids, nozzles, and jetting charts rather than just a bottle.

Nitrous Express is a dedicated nitrous oxide systems brand whose catalog runs from complete vehicle-specific kits down to the supporting hardware that makes a system work: purge kits with AN manifolds, TPS/WOT and digital RPM window switches for safe activation, and billet fuel adapters that tap the fuel system without cutting factory lines. The collection here skews toward VQ35/VQ37 platforms — dual-nozzle systems rated 35-150 HP with a 15 lb bottle for 03-18 350Z/370Z and G35/G37, plus the same system with a 5 lb bottle for lighter duty — and the fuel-side pieces like the billet fuel rail adapter sized for 2003-2009 350Z, 2009-2020 370Z, 2003-2008 G35, and 2004-2014 G37.

Nitrous sits in the forced induction family alongside turbochargers, but with a different profile: no lag, no exhaust plumbing, and power that is fully adjustable by jet size. Before you buy, make sure your fuel system can support the shot you plan to run, and read our guide on forced-induction power upgrades for how supporting mods and tuning fit together.

Do I need a tune to run nitrous?

Yes — at minimum, verify fueling is safe for the shot size you choose, and an RPM window switch (like the TPS/WOT and digital RPM units in this collection) keeps activation inside a safe rev window. Larger shots warrant proper dyno tuning.

What is the difference between the 5 lb and 15 lb bottle kits?

The kits are identical except for bottle capacity: the 15 lb bottle delivers roughly three times as many runs between refills. Choose based on how often you plan to spray.

Is nitrous safe for my engine?

Used within the kit's rated horsepower range, with correct jetting, adequate fuel delivery, and sensible activation control, nitrous is a well-understood power adder. Problems come from oversized shots and lean fueling — respect the jetting charts and start conservative.

Will this fit my car?

The complete systems here are built for 2003-2018 Nissan 350Z/370Z and 2003-2014 Infiniti G35/G37 with VQ engines. Check your year and model against the product title before ordering.