14 GT stock is 34.6mm tubular front swaybar and 22mm solid sway bar.
12 GT 500 stock is 34mm front and 24mm rear, according to a Shelby PDF I found.
https://www.google.com/url?sa=t&rct...DjwdiCrK-ruY1-jhA&sig2=CbrrCAP3VNlz4yVQqu6wow
Page 63 for suspension info.
Might be stiffer material or construction, I'm just going off what I've found so far.