aFe 2-1/2in SS Cat-Back Exhaust | Dodge Challenger V6 (15-21) (49-32067-B)Get increased exhaust flow, more horsepower and torque, improved performance and lower exhaust gas temperatures with the aFe Mach Force XP Cat Back Exhaust System. aFe dyno tests every system for maximum gains, and constructs them from mandrel bent stainless steel for maximum flow and long lasting durability. This system begins at the Cat (Catalytic Converter). Features: Increases horsepower and torque Improves performance Lowers exhaust gas