SS 2007 Used Automatic Gasoline mileage: 81 KM Full electronic exhaust, premium detailing. Its size is 3 inches. It ends with the agency's mufflers and hidden outlets before the mufflers, controlled by remote. The advantage of the kit is that it has no back pressure, and you can step on it even when the mufflers are closed.. and the openings are hidden, meaning they are not visible from the back of the car. Fits Lumina or Caprice.