From my extremely light research (I most certainly could be wrong), but I saw the '15 power packs come out in the summer of '16. I am expecting the '18 power packs to come out this summer.
Hey guys, I really wanted to thank you all for your knowledge and help in purchasing my 2018 manual 5.0 GT 301A White with the Black Accent Package and Active Exhaust. Everything from choosing the year, and haggling the dealer price was with your help. Order guides, x pricing, it all helped...