Tunable EFI Controller: The new efi controller from Techlusion offers a nice range of adjustability for your efi snowmobile. Currently available for use on the firecat efi's and 800/900 efi's. Also available for the new Ski Doo 1000sdi, 600sdi, and Polaris 900 Fusion. The efi controller allows you to independently adjust the fuel delivery in the low end, midrange and top end. Easy installation and tuning just by turning the dials. Great for tuning in your fuel injection if you add pipes, porting, big bores, etc