MBRP 2015-2021 Dodge Challenger 6.2L/6.4L 3in Race Series Cat-Back w/ Quad Tips AS Exhaust SystemOur high flow performance exhaust systems maximize exhaust flow so your engine keeps its cool with lower exhaust temperatures. Your reward will be greater fuel efficiency; more torque; more horsepower; and last but not least a sound that is pure MBRP. Installer Series Cat Back Exhaust System; 3 in.; Dual; Quad Tips Race Version; Aluminized; 4" OD Dual Out Tips Included.