Don't be scared, just do it.
Plenty of people run aftermarket boost controllers everyday and their cars are fine. The Gizmo one mentioned above will be a good buy, or the Turbosmart E-boost street.
Gives the car a little bit more go while you save up for the good stuff.

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Its just the internet dude, its not real.
F.B. Racing
01 WRX (STI badged)
2010 XR5 Focus
06 Impreza Hatch 2.0i