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I recently had the gm stage 1 tune installed on my 2009 Cobalt SS and it was awesome.then I installed a Injen CAI and upper charge pipe.I noticed min hp gain with both.But I still want to get tuned.so the question is has anyone gotten the Trifecta (select a tune)(hide a tune)installed while already having the stage 1 installed as your primary tune.And how much more HP will I roughly gain.

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