We’ve seen Hennessey do some pretty incredible things in the aftermarket tuning scene. It’s been able to get as much as 1,000 horsepower on American sports cars. It’s done performance wonders for pickups and SUVs. It’s even built a supercar that challenged the Bugatti Veyron Super Sport as the fastest production car in the world. Now Hennessey is setting its sights on another performance maven, namely the Ford Focus RS. It’s not exactly a Mustang or a Corvette, but as the trend-setting hot hatch of today’s market, the Focus RS is as sought-after a car as there is anywhere. Hennessey knows this, which is why it has prepared the HPE400 program that gives the Focus RS a new output of, you guessed it, 400 horsepower and 425 pound-feet of torque.