can anyone tell me what type of threads are on nitrous nozzles i assume that they are all standard but what type? npt? or sae? 1/4" or 5/16" i had thought they were pipe threads but i bought an intake that was drilled and tapped but it is a 1/4" sae thread like for a bolt???

 

The Edelbrock direct port I have is 1/8" NPT. I forget what the drill size is. Look at a chart or do a search for drill size.

 

threads for a nozzle such as the NOS nozzles or the NX piranha/vortech nozzles is 1/16" NPT, Nozzles the size of the NX Shark and TNT nozzles are 1/8" NPT.