The last item to install for Stock Eliminator (that is required) is the fuel sampling valve.
I debated between this device and hacking up the factory fuel line and install a "T" fitting.
In the end I splurged and spent 35 bucks for the Metco piece. It mounts between the fuel pressure sensor and the fuel rail.
It has (2) 1/8 pipe ports so later I can install a fuel pressure gauge.
Then I purchased a 1/4 turn ball valve off of e-bay for 10 bucks and the 1/8th pipe to 3/16 brake line fitting at the local auto parts store.
I had a piece of brake line laying around so I bent it to exit the fuel where the sampling cup can easily get to. (Please excuse the dust on the engine. I did not have the time to give the engine a bath before I had to go)
I use a worm clamp to prevent the handle on the valve from vibrating to the open position.