Gibson 15-19 Dodge Challenger SRT Hellcat 6.2L 3in Cat-Back Dual Exhaust - Black Elite (Ceramic)You purchased your muscle car for a reason. Now, Gibson gives you a powerful 3. 0 in. 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's MWA actually tunes your exhaust by using a straight through Venturi design to draw exhaust gases into the muffler and expel it at a higher velocity to deliver optimum power