While Hennessey is better known for working on domestic cars, they do occasionally turn their hand to improving European cars, like this twin-turbo Audi R8.

The addition of a pair of twin-ball turbos, power goes from 562 hp all the way up to 912 hp, at the crank. On the dyno, meanwhile, the Hennessey R8 (known internally as the HPE 900) makes 752 hp at the wheels. All on pump gas.

Hennessey also adds a high-flow air induction system, dual inlet pipes, dual blow-off valves, stainless steel downpipes, and, perhaps most importantly of all, a 12,000 mile/one year warranty.

That’s good enough for a 0-60 time 2.6 seconds and a quarter-mile time of 9.8 seconds and 145 mph, according to Hennessey.

The full kit includes:

• Twin Ball Bearing Turbochargers
• High-Flow Air Induction System
• Dual Inlet Pipes
• Dual Blow-Off Valves
• Stainless Turbo Downpipes Thermal Coating
• Stainless Exhaust with Thermal Coating
• Turbo Oil Pump, Oil Tank & Oil Hoses & Fittings
• Dual Air-to-Water Intercooler Systeme
• Intercooler Tanks, Pump, Hoses & Fittings
• Dual Intercooler Heat Exchangers
• Retains Factory Engine Compartment Covers
• Turbo Air Induction System
• All Necessary Gaskets & Fluids
• Pennzoil 10w60 Synthetic Motor Oil
• Shell V-Power 93 Octane Fuel
• Engine Management Calibration
• Chassis Dyno Testing
• Road Testing up to 200 miles
• Hennessey Interior & Engine Plaques
• Exterior Hennessey & Twin Turbo Badges
• 1 year / 12,000 Mile Limited Warranty