This is a discussion on Question concerning recently purchased boost gauge within the Interior Mods forums, part of the Tech & Modifying & General Repairs category; I recently purchased this boost gauge off of a coworkers wrecked SRT4. What else do I need to install it ...
I'm not familiar with that particular model (would have to google it), but many Defis require a controller unit to operate.
I would use google image search, or go directly to Defi's website and try to match up exactly what model that is, then you will see if it will work standalone or needs the controller.
If it doesn't require a controller, then all you need is a vacuum tube and some wire.