A few weeks back Ford Racing put out a video where they took a naturaly asperated '15 Mustang, an EcoBoost Mustang, and a V8 with a Supercharger to Milan Dragway to show off the aftermarket parts and how quick they were.
Now we know what Supercharger was under the hood of the 2015 Mustang that went 10.97 was this one co-developed and marketed by Roush and Ford Racing. According to the video it makes 600 horsepower.
Our guess is that this is on a VERY concervitive tune up and more power can be had on pump gas, and when you switch it up to E85, we are guessing 750hp will be easily achived.
Note to Ford, why ISN'T the V8 or the EcoBoost Mustang Flex Fuel capeable. Who DOESN'T likw 105 octane fuel out of the pump for 30¢ less than 87!