Loved this car when it first came, even more so after driving in at the Raleigh Auto show in 2011(?).
Two useless contributions:
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I remember the description of the engine powering the wheels being a very convoluted answer back in the early aught's, it seemed like GM engineers didn't want to...
Plus you can't sell what you don't actually own yet! People are jumping the gun; I don't understand the thought process of offering a vehicle for sale that you don't have in your possession.
Thats damn impressive! 22 lbs for 2 extra cylinders?
What about fluid fills though? Oil, coolant? Is there an appreciable difference in capacities?
Also, I would think a second turbo and supporting equipment would add more weight as well.
Still, I'd ballpark it to be maybe ~60 lbs difference...
Aluminum back Butyl. Used in automotive applications for vibration dampening and heat insulating. Its a tar-like adhesive, if not fully adhered it would fall off and look like that.