The system I bought had all the sensors that are needed,
came with map, manifold air temp, water temp, TPS,
IAS, rails(needed to be drilled), O2 sensor, all the
bungs for the injectors(if you need them and the O2 bung... this
was a pretty much plug and play other than drilling
the rails and manifold and I did a ton of those back
at work... then welding the O2 bung on... I started
working on this but then took 2 months off and went up
to my other house to go hunting... then when I came
back I finished it up.. just the 2 minor issues with
the bad TPS and the plug for the ignition(which I
could have just soldered a wire in.. but Holley said
they would ship it out so I waited then when I started
to load the program the TPS showed a error and it
was the sensor which the tech said they had a batch
that were bad so they sent that.. all in all that might
have set me back a week(it was between Christmas and
New Years so I expected a bit of time... all in all
a very easy kit to install.. with a great tech support...
I still have to drill my W-5 intake for the injectors
(gonna change over to the W-5 heads and intake)..
I might do this this coming week