Just going to bump this with some definitive info...
I had conversed a while back with a poster on Youtube who told me his ZL1 didn't pass sound at AMP. After an attempt at an exhaust mod to quiet it down failed, we decided not to take it to AMP for our track day yesterday.
Another ZL1 (2018, A10, all stock) showed up, and he did indeed fail sound.
So, I can definitively report that a stock ZL1 will fail sound at AMP.
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