Dry nitrous jets are an important part of any N20 system on a 8 cylinder engine.  When properly used, you can make awesome amounts of power. It sprays from the nozzle, into the intake pipe, then travels into the manifold.  From there is sucked into the combustion chamber where it oxidizes with the fuel to create that extra bang in power you lust for.  

Nitrous jets come in a variety of sizes. Depending on which kit you are using, the jets size will determine the amount of power that you are going to get.  Since you are using a dry nitrous shot here, there will be no mixing of fuel with the nitrous.  The jets are custom made for your engines protection.  Precision-machined jets are used for adjusting the amount of nitrous sprayed. Special internal taper greatly reduces turbulence.  Tapered means a gradual decline in thickness or width of an elongated object.  This allows a better and consistent flow, with syphoning action which results in very consistent flow and power.  This is something you are going to want to have.  Having an inconsistent  amount of nitrous sucked into the manifold is something that you don't want to experience.  Using state of the art equipment, jets are made to give you with the smoothest flow possible.

Sometimes jets are called nozzles.   Using different types of nozzles is going to depend on your set up.  Tuners would know, that its not a good idea to put the biggest nozzle you have on a stock motor.  You would want to save that nozzle for a more built up motor.

• Using nitrous jets 43/40 you make about 75 HP
• Using nitrous jets 40/46 you make about 100 HP
• Using nitrous jets 34/54 you make about 125 HP

Those are all the jet sizes for a 8 cylinder nitrous kit engine.