JDM 4" TIP 2.5" INLET RACING PERFORMANCE DEEP SOUND TWIN LOOP MUFFLER EXHAUST Material: T304 Stainless Steel Total Length: 23" (tip to tip), 4" Flat Tip, 8" Width 2.5" Inlet Inside Diameter(ID) to 4" Outlet outside Diameter Strong and Deep Tone, not loud but noticeable Professional Installation is Always Highly Recommended