First appearing in 1989, Subaru's EJ engine line is its go-to series for passenger vehicles. The EJ257 engine is one of a long line of this popular series. Seen in the Impreza, Outback, and Legacy, this flat engine saw production starting in 2004. It is available through the large inventory on eBay, but make sure that you know the model and year of your vehicle to find an appropriate match. The EJ257 is a 16-valve engine with two banks of horizontally-opposed cylinders that move in conjunction with one another. These are four-stroke engines, which allow them to make the most efficient use of fuel. Four-stroke engines offer more torque and power over two-stroke engines. Because they make the most of the fuel available in the cylinder head, these engines produce fewer emissions and tend to be quieter. Like the name Subaru, the EJ257 engine is more reliable and lasts a long time because it does not rev at a high number of rotations per minute. Your engine choice means that you may not have to worry about engine repairs again for many years.Shop the extensive inventory of motors, parts, accessories, and complete engines for Subaru!