Designed to increase horsepower and torque while providing an aggressive, low-frequency sound level1.75” to 1.875” to 2” high-flow 16-gauge stepped primary headers with a 2.5” collector4.5” diameter, 16-gauge HP-Plus muffler with 2.5” inletRemovable 1.5” 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 tone2.50”, 220°, 16-gauge heat shields18 mm and 12 mm O2 bungs welded into the primariesOptional Ghost pipe available separately to give a 2-into-2 lookMade in the U.S.A.