I need the fitting that goes into the fuel rail that will allow me to run my nitrous and fuel pressure guage at the same time. I have been told that NX makes one but I got lost looking through their list of fittings with no pictures. This is going on a 91 Z28 with Nitrous Express 150 shot. If anyone knows an alternative route feel free to add your suggestion. Thanks for your input. Brandon

 

this piece is -4 female on one end and -4 male on the other end. they also make it in -6. the hole on the side of this item is 1/8 NPT. Some of them have like 2 or 3 holes and some have just one. part # 15513 it can be seen here http://www.nitrousexpress.com/catego...category_id=65