The Boondocker EFI control box allows you independent control of your fuel settings. You can richen our lean out your fuel at up to 5 different rpm settings! Go from 30 points richer to 30 points leaner for the ultimate adjustability of your RZR. If you have a full mod motor that more fuel or just a stocker than needs to be dialed in, this is the most advanced fuel management system available. Digital display makes it easy to read and adjust. Simple installation.