I have a FAST XFI 2.0, but have not installed it yet. I think because they sell a PnP Dual-Sync dist for my 440, pre-made harness (although pricy) and the small ECU size was part of the decision. I did not want to try adapting a crank trigger, or have to wire a harness, just wanted something to PnP to replace the Edelbrock XT EFI electronics.
