Even at lower power levels than the car runs currently it was a beast. @Omni beat up on a tuned Cadillac CTS-V Wagon as well as a tuned F13 M6 Gran Coupe. With the car now making over 800 to the wheels it is safe to say he can take on even more stout competition.
He is running a Precision 6266 turbocharger at 35 psi of boost. 100% methanol is injected in a direct port setup. A water and methanol blend is utilized as well before the compressor. Tuning is by @NickG of Technique Tuning and done on the stock DME no less.
The result? 813 horsepower and 819 lb-ft of torque at the wheels which works out to comfortably over 900 at the crank. However you feel 800+ horsepower at the wheels is serious power and this may be the world's most powerful E39 at this point.
Simply incredible results and props to @Omni for continuing to push the boundaries.