This is an old NOS brand nitrous plate kit that fits the cobra/gt-40 style intake. NOS doesn't make this kit anymore and nitrous express sells it for over $1000. The solenoids work and it comes with 2 gaskets, nitrous jets and a 20amp relay. 

To complete this kit for install u need a nitrous feed line, fuel feed line, arming switch and fuel line adapter.

Jets included are for 100hp shot