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Like he said GM had this tuned really good from the Factory, He said they car ussually gets 25-30 With CAI and Tune but the car ussually starts at 355 RWHP not 370. I guess GM had it Running better than average to begin? He said they ussually end up between 375-385 after the CAI and Tune. They just did not see the huge jump because it started so high.
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