Kelleners power pack is basically a rebadged Hartge power pack from what i gathered online. They sell it at Turnermotorsport for about $1300. The device works pretty much just like the JB4 in concept but i'm sure they have different adjustments. The problem with the Hartge tune is that they offer zero warranty and support for non Europe customers so you are on your own if you run into any issues. Thats what Turner told me when i inquired about it.
2014 LCI 550i M Sport | 3D Design Front Spoiler | BMW Performance Black Kidney Grills | BMW Performance Trunk Spoiler | BMW Performance Gloss Black Diffuser | Painted Reflectors | Wincos 30% Tint | Supersprint Quad Exhaust | AC Schnitzer Springs | MORR VS8.2 Brushed Finished Wheels 20x10R and 20x9F | Michelin PSS Tires 245/35/20F 285/30/20R | M550d 16mm RSB |||More Photos of my car here|||