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Discussion Starter #1
Hello guys,

I am new to the forum and new to Cobalt's. I have been road racing mustangs for years and am very familiar with anything to do with those. However I am completely new to this platform/engine.

I just purchased a new to me 2009 Cobalt SS. I believe this car possibly has some sort of aftermarket tune on it. From what I understand, a stock SS Cobalt runs around 15PSI of boost. It is about 30 degrees here in Ohio and my SS is showing somewhere around 17-18 PSI of peak boost and spikes to somewhere around 19-20 for a few seconds.

Does this sound like it might have something like a GM Stage 1 tune installed on it already?
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