4" ID EXHAUST TIP: Inlet diameter - 4 inch, Outlet diameter - 4 inch, Overall length - 12 inch. Universal fits 4" outer diameter existing tailpipe. EASY INSTALLATION: Simply slide the tip onto the exhaust pipe and tighten the bolt. Installation is complete with just a wrench. BRIGHT APPEARANCE: Made of stainless steel, black coated. Resistant to high temperatures and corrosion, perfectly withstands the high temperatures of exhaust. UNIQUE DESIGN: The pure and elegant black exterior can perfectly decorate your vehicle. Replace your rusted tailpipes and look different. MEASURE BEFORE BUYING: Measure your existing exhaust pipe to make sure it is 4" OD. Fits 4" outer diameter exhaust pipe only.