Following MTM's 702hp RS6, ABT's 700hp RS6, B&B decided to go with 715hp for the RS6. However it's not like they did an entire revamp of the engine bay, the 5 ltr V10 Twin Turbo engine of the RS6 really does show what it's capable of when simple tweaking to the ECU, an exhaust and intake upgrade would simply boost the already insane 580hp engine to an almost annoying 700hp. High capacity engines would naturally produce so much exhaust at idling speeds that it's possible to tuck in larger turbos, just imagining what the RS6's engine would be capable of if some tuners would finally crack it open, bore it up, plasma coat it, fit larger turbos, intakes, fuel injectors, a change of cam profiles, direct flow exhausts coupled with an ECU upgrade would bring, we'd reckon 950hp as feasible.
