The Surbo is a cross-jetting air pressure vortex generator that is assisted by engine brake regeneration (conversion of engine braking to forward momentum). In other words, the Surbo is an air pump.
Let's discuss further about this little thingy that claimed by the company which able to increase horsepower and improve fuel consumption. First of all, this product claimed that it will improve the air pressure vortex that enter to your throttle body. So based on this theory, it will allow more air to your engine combustion area; more air + fuel = more power.