If I was smarter and did some research, I would have gone this route instead of the orgy of gauges I currently have.
Stack ST8110SR Boost Street Dash
This system is specifically designed for turbo charged street vehicles and rally cars.
The system integrates Tachometer, Speedometer, Boost Gauge, Odometer, Trip Meter, Oil and Fuel Pressure Gauge, Water and Oil Temperature Gauge, Volt Meter and Fuel Level.