I don't have roush, but the ataks sound quite similar and I've got a set for sale if you're interested...
2014 Ford Mustang 3.7 Premium 6-speed:
BORLA ATAK 3.7 FOR SALE! PM me for info
MPT Performance Tune,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