Aero Exhaust TR3.3 T304 3 inch inside diameter 4 inch body 13 inch long resonator The TR3.3 is our shortest smallest resonator for 3 inch exhaust pipe It will fit almost anywhere in the system while helping reduce rasp We recommend using a couple of these in order to reduce rasp as much as the TR3 1 Inside diameter: 3"Body length: 11"Outside diameter: 4"Overall length: 13"