What is this SVT engine part?

It's on the fuel rail. Anyone?

http://i251.photobucket.com/albums/g...0708_21161.jpg

fuel rail pressure sensor. it monitors the pressure drop across the rails, (basically acts as the regulator on a returnless system).

Thanks man!

thanks does anyone know where the stock location for the vac line should run to?

From that sensor it needs to see Boost/Manifod Pessure

okay thanks thats what we were thinking but were not sure. thanks for the help!