Not sure how you define stock? Have the injen intake and eibachs and other night was 4.2 and 12.9 followed by a 4.4 at 13. Was about 38 degrees on a freshly black topped road... Pirellis didn't hook up so wasn't my 3.9 but I will take it...
"Dark Shadow"- 2014 Jeep GC SRT
BT Catch Can, InJen CAI, Tint all around, debadged, Tinted tail lights, Vinyl Wrapped Window Trim, Road Magnet-Mids, Blackops endlinks & rear control arms, Black Powdercoated Borla ATAK, 87mm TB, CFR front splitter, Cross Drilled Brembo Sport Brakes w/Hawk Pads, Black coated Spider Monkey Rims, Blendmount Valentine V1