2015-16 5.0L Coyote Improvements
The 2015 model year marks the first major design changes for the 5.0L Coyote engine. The improvements to 2015 Coyote (or Gen 2 Coyote) focus on allowing it to breathe better. The improvements, many of which are derived from the lessons learned in developing the special-edition 2012-13 Mustang Boss 302, allow for better breathing, especially at higher engine speeds.
See the technical reference PDF for more details: FPP Gen 2 Coyote Technical Reference