Quote:
Originally Posted by Sophisticated Redneck
Drive back to Napa and pep boys and slap them upside the head, they should know better. NPT sizes are not relative to the outside diameter. It's confusing so just Google a npt size chart. 3/8npt measures 5/8 outside diameter. Trust me you have a 3/8 npt fitting (3/8 npt measures 5/8 or approx .675inch outside diameter). The previous 3/8npt to 3/4 Barb links me and the other member posted will fit your catch can perfectly.
The fittings I use are for -AN to NPT so I can use braided line. I reccomend just getting the Barb fitting unless you want to do braided -AN lines which make it bullet proof but add alot of expense. (If you really want to let me know and I'll dig up all the part numbers I used)
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Ahhhhh..... THANK YOU for the clarification! I'll be all over those fittings! I may consider the -AN route, but for now I want it to look as stock as possible.
THANKS!!!