Yeah they claimed it takes the Crate ECU and 100 octane fuel to run the number. It has a button on the dash for high octane mode.

I saw a Dyno vid last night of one, the high performance ECU was worth 25HP, pressing the high octane button(with high octane in the tank) added another 50HP. This particular Demon put down 704 off the hauler, 728 with the crate ECU, and 776 on the high octane button. So stock? That is up for debate, these are all parts that came with the car so its a grey area in that aspect I guess?

68 Barracuda Formula S 340