NOS has done it again! The stainless steel Annular Discharge nozzle is the most effective design in the world, the Annular Discharge Fogger nozzle's secret lies in specially engineered annular orifices which mix the nitrous and fuel in a radial pattern outside the nozzle tip to provide superior atomization of supplemental fuel as well as more even fuel distribution within the nitrous flow. This nozzle design produces an even tighter "cone" of nitrous oxide/fuel mixture and provides more precise control of nitrous/fuel ratios throughout the jetting spectrum. It is important to note that the Annular Discharge nozzle shoots out straight, and as such in NOT a direct replacement for the standard Fogger or Fogger2 nozzles. It is designed to be fitted to the manifold at a very tight angle (much closer to 30° than the normal 90° but entirely dependent on runner design). Becasue of the way the Annular Discharge nozzle c an rotrude into the intake tract and disrupt flow. The nozzles are made of stainless steel for superior durability.