Give your 6.4 liter 2014 Challenger SRT8 to the German tuner O.CT and they will upgrade it with their OCTSRT-700 program. Obviously, this’ll convert your standard 6.4 HEMI with its 470 HP and 470 Tq to a 7.0 liter 720 HO and 645 TQ monster. OMG!

Photos: O.CT Tuning