The EJK evolved out of the need to address the ever-increasing complexity of factory fuel injection. For the newcomer to the market or professionals wanting an easier method for tuning fuel injection, the EJK is a customizable solution for the shop that wants to take control of their tuning needs. The GEN 3.5 EFI controller is an extension to the GEN 3 controller. The GEN 3.5 technology was released in 2009 also in the DP private label program. The GEN 3.5 controller has the ability to add or pull fuel within each available fueling zone.