Finally, a comparison! Some real stock numbers! SCT bought their 2015 a few days ago and took it to the track for a BONE STOCK 1/4 run, ran it in 12.86 @ 107. This was on stock tires, not the wider Pirellis that come with the PP, though. But anyway, Ford ran a little more than a second faster with a few minor bolt ons, some slicks, and a tune! Sounds good to me
(keep in mind this car only had like 130 miles on it, not even close to broken in)
I would like to know why Ford is using a exhaust pipe diameter that is smaller that the 2014's. The cfm flow rate of the throttle body and intake tube would be nice to know too.
I read that Ford added the mid-pipe chamber mufflers and smaller piping to meet global noise standards due to the fact that the mustang is now going on sale outside of the US. I'd be a lot more expensive to have "US pipes" and "euro pipes" so they just reduced the size for all of them, I'd assume.