King, what size drill bit are you using to tap the airbox for the NOS nozzle?
IslandRider said:If you use 1/4" bit, you'll be able to tap the hole for the nozzle as deep or as shallow as you want. Just remember, the deeper you run the tap, the deeper the nozzle will seat. Don't run the tap all the way through or that's where the nozzle will end up!! Teflon tape is highly recommended as well.
My 2 cents worth. (not trying to steal your thunder King)