Some drag-racing enthusiasts prefer to buy their 10-second car straight from the dealer, whereas others would gladly spend their hard earned, and time, in building one.

Take this Audi S4, for example, which started life sometime between 1994 and 2002 as a B5 sedan.

Back then, it had a twin-turbo 2.7-liter V6 that was good for 265 PS (261 HP / 195 kW) and 400 Nm (295 lb-ft) of torque in Europe, and 250 hp (254 PS / 189 kW) and 258 lb-ft (350 Nm) in the United States.

The official 0 to 100km/h (0-62mph) time was 5.6 seconds and top speed was electronically limited to 250km/h (155mph). Very impressive, indeed, even by today’s standards, but not impressive enough for the owner of this example, who wanted something truly extreme for his ride.

Also Watch: Does This Audi S4 B5 Look Like A 1,100HP+ Super Saloon To You?

According to the video posted below, this S4 makes a whopping 1,250 PS (1,232hp / 919kW) and 1,345Nm (992lb-ft) of torque when running on E85 fuel. The insane amount of power available via the right pedal helped it complete a half-mile run at 318 km/h (198 mph) on a closed airfield during the Race1000 event in Germany last week.

Just by looking at it, nobody would be able to tell that it has more power than a modern hypercar, as the exterior remains pretty much stock, but it’s only when the driver pushes the throttle hard and its double tailpipes start spitting flames while the tires struggle for traction that all hell breaks loose.