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NOS Pro 2 Stage Plate System

Dual Stage Big Shot Nitrous System Pro 2-Stage V8 Holley 4 bbl

PART# 02301NOS

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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. Kit comes complete with: * Bottle and mounting brackets * Injector plate * Jets * Solenoids * Switches * Wiring * Stainless steel braided supply lines * Fittings * Mounting hardware


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


Bottle ColorNOS Blue
Bottle Size10 lb
Emission Code4
Fuel SolenoidCheater
Included Jetting Horsepower150, 200, 225, 250
Jet StyleFlare
Max Horsepower500
Nitrous SolenoidCheater
Number of Solenoids4
Number of Stages2
Plate Flange4150
Product TypeNOS System
System StyleWet
Part Number02301NOS

Service Parts



This part is legal for sale or use on Racing Use Only Vehicles

The following vehicles are considered Racing Use Only Vehicles:

  • Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street

WARNING: It is against the law to install this part on an Emissions Controlled Vehicle

Tech Resources

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.
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