Snow Performance EFI Stage 3 Water/Methanol MPG-MAX ControllerThe stage 3 controller from Snow Performance stands as the most advanced water methanol injection controller on the planet. Utilizing boost fuel injector pulse width to command injection, the stage 3 will create a 2D MAP to calculate load of the engine and inject precise amounts of water methanol exactly when your vehicle needs it. Taking it one step further, the stage 3 commands 2 nozzles independently of one another to ensure exact amounts of water