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NOS Big Shot Wet Nitrous System for 4150 4-Barrel Carburetor

Fits Holley 4150 and Carter AFB (late), 190-300 HP, includes Black 10 lb Bottle


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$875.00   Suggested Retail
$708.26   Holleydays Price
Estimated shipping date: 12/11/2020
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NOS is proud to now offer its popular Big Shot wet nitrous systems in black. These systems are adjustable from 190-300 horsepower and use a special fogging plate design that vastly improves nitrous flow, fuel atomization and mixture distribution. Our Big Shot plate utilizes a unique spray bar that is equipped with tiny orifices that are precisely located to efficiently dispense a powerful nitrous/gasoline mixture for unbelievable horsepower gains. Power output is adjustable from 190-300 horsepower simply by changing fuel and nitrous jets. This single stage system includes everything needed including 6AN feed line, 1/2 inch fogging aluminum plate, black 10 lb bottle, solenoids, hardware, and instructions to complete the installation.


  • Includes unique Fogging design aluminum plate to vastly improve nitrous flow, fuel atomization, and mixture distribution
  • Includes jetting for 190, 225, 275, & 300 horsepower
  • This wet kit provides exceptionally smooth power delivery
  • Bottle is made from 6061-T6 Aluminum
  • Includes 10 lb. black nitrous bottle with brackets
  • Includes mounting hardware and instructions


Bottle ColorBlack
Bottle IncludedYes
Bottle Size10 lb
Brackets IncludedYes
Delivery StyleSquare Bore Plate
Emission Code4
Feed Line Size6AN
Fuel SolenoidCheater
Included Jetting Horsepower190, 225, 275, 300
Jet StyleFlare
Max Horsepower300
Nitrous SolenoidSuper Pro Shot
Number of Solenoids2
Plate Flange4150
Plate Height1/2 inch
Product TypeNOS Kit
Solenoid Top Cover ColorBlack
System StyleWet
Part Number02101BNOS

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

Big Shot systems are designed for use on engines that have been extensively modified and intended primarily for competition applications. To supply the proper amount of fuel to the carburetor and Big Shot system, a fuel pump must be used that is designed to operate between 5 and 10 psi, with a flow rate of at least 0.1 gallons per horsepower per hour at 6 psi. High cylinder pressures are generated with the use of these kits, and this greatly increases the load on internal engine components.
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       X  Holleydays 2020 20% off and DD
       X  Holleydays 2020 20% off and DD