|  |  Boost Gauge
The key to getting horsepower from the turbocharged motor is to increase boost pressure produced by the turbocharger. More pressure means more air and fuel can be stuffed into the cylinder on each stroke, and more fuel in the cylinder means more power produced.
But too much boost can be bad. At some point the fuel system will not be able to deliver enough fuel to match the air that is being forced into the cylinder. The fuel-air mixture will become too lean, and will burn very hot. Those extremely hot temperatures can severely damage pistons and valves, and can destroy your engine.
This is not much of a problem early on in the modification process, but to be safe we urge you to install a boost gauge (if you don't already have one) as the first modification to your WRX. The Prosport Evo gauge, above, is one of our most popular boost gauges.
The boost gauge can be installed in a number of locations, but the A-pillar (the one that connects the dash to the roof), the gauge surround, or the center dash are great locations.
Next: High-flow intake systems
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