Most supercharger kits (ie: Jackson Racing, etc) include several extra components that are designed to help run the system with a stock engine computer. Some of these are the FMU (Fuel Management unit), MAP sensor blocking plate, etc. Anytime you are running a tunable ECU like those we offer, these devices should be REMOVED. All of our tunable/chipped/reflashed ECU's are setup to run a supercharged engine without the use of these devices.