Designed to increase horsepower and torque while providing an aggressive, low-frequency sound level16-gauge HP-Plus muffler with 2-1/2'' inlet1.5'' absorptive baffle with 3'' reverse cone outlet to maximize torque baffle is wrapped in stainless steel wool and high-temp fiberglass for a rich, mellow tone1-3/4'' to 1-7/8'' to 2'' high-flow 16-gauge three-step primary headers with a 2-1/2'' collector, 4-1/2'' diameter18 mm and 12 mm O2 bungs welded into the primaries2-1/2'', 220°, 16-gauge heat shieldsOptional Ghost pipe available separately to give a 2-into-2 lookEnd caps sold separatelyMade in the U.S.A.