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I'm seriously wondering about that drop at 4500 rpm. I'm wondering if there's some coding in the ecm that does that until 1500 miles. that would help GM ensure some following of the break in period. but that's just extra coding that would still be there after the break in period that would need to be by passed.
I do like how I just googled the 11/12 GT500 and came up with the same times the auto zl1 pulled from HPE. but I'm sure that won't shut the nay sayers up.
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Originally Posted by fbodfather
We do not want to use the Z28 moniker on a car that does not deserve this hallowed name.
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