aFe POWER MACH Force-Xp 15-17 Dodge Challenger Hellcat V8-6.2L 304 SS Cat-Back Exhaust SystemThe MACH Force Xp cat back exhaust system for the Dodge Challenger SRT Hellcat is constructed from 3" mandrel bent 304 stainless steel and is MIG welded. The system uses dual high flow mufflers with 3" tubing which improves performance across the power band while maintaining the true muscle car sound. aFe has incorporated a crossover balance tube to equalize and evenly distribute exhaust pulses traveling through the exhaust system. This not only