My former website documented details and photos on many of these modifications. Although I no longer own the 951, I have reintroduced some of these photos in hopes they will be beneficial to a car owner or two out there. Contact me by email if you need to.
The gauge itself was illuminated by a line spliced in to the dashboard headlight knob. It would illuminate when the foglights received power.
The brass T is then connected to the (faintly visible) black vacuum line from the boost gauge using another brass connector. The boost gauge essentially reads the same vacuum or boost level that the KLR box reads, as it is one continuous closed circuit. It is important that the connections therefore be airtight.
The H.R. manual boost controller uses a vacuum line connecting from the cycling valve, running through the boost controller, and exiting through the wastegate. It is infinitely adjustable and allows you to manually dial in lower or higher boost levels. It can be made to work with either single or dual port wastegates - talk to Huntley Racing. Here is a photo of the controller itself located in my glovebox - a very nice installation that is out of the way and keeps the interior looking stock.
I removed the instrument cluster in my car (requires steering wheel removal) and recovered the three silver light tunnels that you see here. I stripped off the old paint and recovered them with tinfoil and double-sided scotch tape. I also replaced the three 2 watt light bulbs with 3 watt bulbs. The result - much improved nighttime lighting!!
Unless you have replacement light tunnels, do not force them off - they are bonded on and will break. Also, 5 watt bulbs are too hot and will melt the bulb sockets. Click here to see a new LED solution by a member of Rennlist which drastically improves lighting.