Subaru EJ engine

The Subaru EJ engine is the second generation of Subaru boxer engines, introduced in 1989 to succeed the EA series, and it was the mainstay of Subaru's engine line for three decades. Every EJ is a 16-valve horizontal flat-four with single or double overhead camshafts, built naturally aspirated and turbocharged, with outputs from 94 to 341 hp (70 to 254 kW). Primary engineering was done by Masayuki Kodama, Takemasa Yamada and Shuji Sawafuji of Fuji Heavy Industries. The range grew from the 1.5 litre EJ15 through the EJ16, EJ18 and EJ20, the last being the hot-rod turbo engine of the Impreza WRX STI. The EJ is also popular in light aircraft, kit cars and as a swap into air-cooled Volkswagens and the Volkswagen T3 Vanagon. At the 46th Tokyo Motor Show in October 2019 Subaru announced that EJ20 production would end by March 2020, when it was sold only in Japan for the WRX STI.