The Borla Atak sounds incredible on the 4V Motors, I have that set up on my 2011 GT! You're going to love this system.
It looks like they're do back in stock any day here now. Put yourself on our "Notify Me When back In Stock" list on the product page and we'll hit you up the second they hit our facility!
I hope this helps! Our Mustang Experts are here Monday-Friday from 9AM-9PM EST and Saturdays from 9AM-5:30PM EST. If you want to hit them up, their number is 866.727.1266. I can also have one of them call you directly.
Dan Bailer | AmericanMuscle.com
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