Who ever is saying that only verts are limited is wrong, I have a 2012 SS coupe and I hit 155mph n got the "speed limited" to 155 mph but yes u can get a tune to remove the speed governor. Now 155mph wasn't fast enough for me so I tuned it n so far I've hit 168mph but I was running out of road so I had to start slowing down after that.Now on the ZL1 yes verts are limited and coupes are not, just adding my 2cents
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