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Sounds interesting. Were any of the initial test cars stock before the tune? Besides the wastegate mod that is. If I were to get this I'd stay stock for the most part everywhere else and am curious as to the benefit w/o catback or I/C upgrades.
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I am a GM Engineer.
I do not claim to be a GM representative, all of my postings are my own interpretation and personal opinions.
2007 Deep GXP - M5, Loaded w/o OnStar
Mods: JPM Custom Shifter - Stubby Ant - WindRestrictor - Dejon TB Elbow - Dejon BOV Spring - JPM Center Console - JPM Visor Covers - Wester's Tune - Draw-Tite Hitch
NASSOA Founding Member
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