This dry nozzle has an I.D. of .156 and can flow up to 500HP of nitrous. This nozzle can be found on extreme racing applications and daily street cars alike. Unlike the other guys, who have 1/8NPT threads but keep the 1/16NPT inside orifice we have a true 1/8NPT orifice all the way through. Dry nozzles/system generally require more tuning than a wet system because fuel must be added through the vehicles standard fuel system. This nozzle can spray all the nitrous you need to deliver plenty of power for your application.