The stock Audi S4 Avant, from the B5 generation, used to be pretty fast back in the day, but this tuned example is much more powerful.
How much? Well, it is powered by a 3.0-liter RS4 engine with a new turbocharger and a long list of other tweaks that allow it to put out as much as 1,200 horsepower.
By comparison, in stock form the B5 S4 used a 2.7-liter twin-turbo V6 that made 265PS (261hp) and 400Nm (295lb-ft) of torque. The 0-100km/h (62mph) sprint was dispatched with in 5.6 seconds, and top speed was electronically capped at 250km/h (155mph).
The highly-tuned estate was captured on camera at Vmax reaching an alleged top speed of 303,19km/h (188mph) during its run. Considering that its exterior has been kept pretty much unmolested, it sure is one hell of a sleeper that can pop a surprise to most supercars out there.