I just got a 2 1/16" ultra-lite autometer nitrous pressure gauge Im mounting in the dash. Does anyone know the size fitting and line that goes into the back of it? I think its -4an line but I'm not sure because it didn't come with instructions or paperwork.

Thanks.

Check out the "custom" gauge pod I made out of sheetmetal. its on the 2nd page of the website in my sig on cardomain. Let me know opinions on it if you have the time.

 

Mine is 4an.