For the base MSRP, I factored in 2% price increase. Since we are dealing with a very expensive car, a 2% increase will be around $1222. I could be wrong, but I am going with the extreme here. I also think the ZL1 is a special car and GM might give it a higher price increase as compared to other Camaros. Since ZL1 has been out one model year, we have no comparison for ZL1 unlike 2016 to 2017 Camaro SS prices which were $605 increase. ZL1 is just in another league and very limited too. If the car is limited, GM can increase price much more. So 1LT to 2SS will probably be standard price increase across the board because that is where most of your sales come from. But, I believe ZL1 is the exception and will be treated differently. Just my opinion here.
For the Gas guzzler, I was under the impression it would be retested again. Also, one of our members ron scubadiver came up with a good point about how it might be higher. Reference thread below quote:
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Almost certainly it means closer ratios and no long overdrive. It will probably have a lousy highway EPA sticker and a higher gas guzzler tax than the current ZL1 M6, but who is going to take this car on a boring interstate ride to wear out a set of tires which cost at least $2k?
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http://www.camaro6.com/forums/showth...485497&page=22