unless you want the car to be obnoxiously loud, i wouldn't pair atak's with headers or an offroad x pipe or anything. typically, people who do the exhaust work up front go with like stock, or touring axlebacks bc it's just too much.
2014 Ford Mustang 3.7 Premium 6-speed:
BORLA ATAK 3.7 FOR SALE! PM me for info
Borla Touring Axlebacks, Boss 302 Strut Tower Brace,
Airaid Modular Intake Tube, aFe Pro Dry S Air Filter,
Mustang GT Grille w/ Foglight Mesh, Taillight Tint, Tinted Door Ventvisors, Diode Dynamics LED's