cat back

o2 sensor and cat monitors wont ready themselves for emission test, had 91 tune from bama, flashed back to stock, have driven almost 1000 miles with no luck, have carb legal flowmaster shortys and mbrp catback exhasut on it, stock air intake (removed airaid cai for emission testing), no matter...

Location: Fort Lauderdale, FL Asking Price: $700 or best + shipping (free local pickup), Payment via paypal or cash if local pickup. Year Car: Fits GT 2015-2017 Ford Racing Sport by Borla exhaust with black chrome tips for Ford Mustang GT 15-17. This complete exhaust system was just...

Hello, I have a 2006 Mustang GT Convertible that I just purchased recently. It's a 5 speed Manual with the 4.6 Liter. I would like to make it sound a little better than it does and if it helps performance that would be even better. Anyone know where I should start looking?