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Pro Two-Stage Nitrous Plate Kit V8 Holley 4-Barrel (Two-Stage Big Shot)

Brand NOS Reference 02301NOS

NOS Pro Two-Stage nitrous oxide systems give you a moderate shot of juice at the line to get a solid start. Then, with the tires properly hooked up, a second shot gives you serious muscle through mid-track and on into the top end.

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Available from the manufacturer 2 in stock at factory
Expected delivery to you on Nov 13, 2026
This lead time is an estimate and may change due to circumstances beyond our control

Pricing and ordering reserved for professionals.

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NOS Pro Two-Stage nitrous oxide systems give you a moderate shot of juice at the line to get a solid start. Then, with the tires properly hooked up, a second shot gives you serious muscle through mid-track and on into the top end. These systems are fully tunable just by re-jetting. Racing fuel, a racing ignition system with timing control, and internal engine modifications are required.

* Bottle and mounting brackets

* Stainless steel braided supply lines

Key features

  • 2 Sets Nitrous/Fuel Solenoids
  • Includes 2 Cheater Solenoids
  • Includes SuperProShot Nitrous Solution
  • More Gradual Power Application

Technical specifications

  • Brand: NOS (Nitrous Oxide System PI)
  • Manufacturer part number: 02301NOS
  • Jet type: Flare
  • System type: Wet
  • Maximum power: 500 HP
  • Jetting included for: 150, 200, 225, 250 HP
  • Number of stages: 2
  • Number of solenoids: 4
  • Nitrous solenoid: Cheater
  • Fuel solenoid: Cheater
  • Plate flange / bolt pattern: 4150
  • Bottle capacity: 10 lb (4.5 k PI)
  • Bottle colour: NOS Blue

Good to know

  • To supply the proper amount of fuel to the carburetor and the Big Shot System, a fuel pump must be used that is designed to operate between 4.5 and 7 psi, with a flow rate of 0.1 gallons per horsepower at 6 psi. For example, an engine that produces 350 horsepower when the Big Shot System is activated will require a fuel pump that flows at least 35 gallons per hour at 6 psi.

Important: this product runs on nitrous oxide (N2 PI), a gas we do not supply and which is currently difficult to obtain. It is your responsibility to find a local supplier of gas for professionals. NOS bottles do not comply with CE standards (they do not carry the PI mark): only CE-approved bottles may be used. European manufacturers offer bottles approved to contain this gas; please check the applicable standards and verify the manufacturer's origin and compliance before purchasing. NOS fittings are not metric (AN / NPT threads depending on the part numbe PI): plan for the adapters needed for your installation. Please comply with the regulations in force in your country.

Product family: Engine
Engine Kits nitro et kits de plomberie
Produit mis à jour le: 2026-10-23 15:36:59