DFAST is the engine boost box, both HP and torque, which was specially designed to respond to every use effectively, with the system of all functions. It can adjust the proficiency increase, with the unbelievable saving of hidden waste rate. Every model of the product is designed, researched, tested and quality controlled of every production step, by expproduction step, by expt engineer. This makes DFAST has got popularity and trustworthy from the car users all the time, especially Common Rail engine cars.