The Flowmaster American Thunder Cat-back exhaust system for 2015-2020 Dodge Charger SRT 392, R/T Scat Pack models with the 6.4L engine, as well as the SRT Hellcat with the 6.2L engine. This system is perfect for the person looking for an aggressive exterior sound level while maintaining a moderate interior sound with all of the performance benefits that you would expect from Flowmaster. The bolt-on 409S stainless steel system features our exclusive dual 3.00 in. Scavenger X-pipe assembly for maximum power and a deep unique tone. The mandrel-bent tubing flows into a pair of specially built Super 40 Series mufflers with 3.50 in. internals for a deep powerful sound, and includes dummy stands for the factory MDS actuators that eliminates the valves. The system is finished off with a pair of large 4.00 in. polished stainless steel tips embossed with the Flowmaster logo. The exhaust system is covered by Flowmaster's Lifetime Limited Warranty and includes all necessary parts and hardware for an easy installation you can do at home. Note: Eliminates the Factory MDS valves