The New 2011-2014 Ford Mustang GT BBK After Cat High Flow X
pipes are designed to eliminate your factory resonators to increase
performance and horsepower. This is an after-cat product they are smog
legal, just like a cat-back exhaust system.
For the 11-14 5.0L Coyote engine BBK designed the X pipe with 2-3/4" CNC mandrel bent tubing for
great power and sound