Gibson 05-10 Ford Mustang Base 4.0L 2.5in Cat-Back Dual Exhaust - StainlessBrand Gibson Part Number 619005 Category Exhaust, Mufflers & Tips Catback Condition Brand New Original Manufacturer Packaging You purchased your muscle car for a reason. Now, Gibson gives you a powerful Exhaust System that screams performance. You can expect a deep powerful exhaust rumble tone with improved acceleration and increased horsepower gains when you put the pedal to the metal! Gibson Muffler actually tunes your exhaust by using resonance