Work started on the V8 6.4-liter HEMI engine which in its standard configuration delivers 477 PS (350 kW) and a peak torque of 637 Nm (470 lb-ft). The motor received a custom compressor kit and a charge air cooler system along with a software optimization that have bumped output to 564 PS (415 kW) and 735 Nm (542 lb-ft). Upon request, O.CT Tuning can make additional modifications to increase power beyond the 600 PS (441 kW) mark.
The Dodge Challenger SRT8 OCTSRT8-700 seen in these images features the same V8 HEMI engine but the client wanted even more muscle so displacement was increased to 7.0 liters which lifted power to no less than 720 PS (529 kW) and 875 Nm (645 lb-ft) of torque.
On a related note, O.CT Tuning is also offering a compressor upgrade for the Dodge Ram 1500 equipped with the V8 5.7-liter HEMI engine.