Since 1989, Subaru has been cranking out flat four EJ family engines. You can find them in all sorts of Subaru products, but the boxer beat makers have also found favor with project car builders and kit car lovers. The EJ20 version has powered some of your all-time favorite Subaru hits. This includes many versions of the WRX and WRX STI. And a modified version of this engine powered the legendary 22B. But the time has finally come for Subaru to say goodbye to its ready-to-retire mill.

Per Jalopnik, Subaru will shuffle the EJ20 out with one final assignment. It will be placed between the front fenders of a model appropriately called the WRX STI EJ20 Final Edition. Just 555 examples will be built (…nice), and the power figures are 304 hp and 311 lb-ft of torque.

What’s coming next for Subaru? It seems a 1.8-liter flat four is on deck. What’s next for the WRX STI though, is a different story. It’s likely we’ll see a modified and massaged version of the FB20 or FB25. Some are even speculating that the next STI could gain an electric boost, which means the FB20D e-Boxer could come into play.

Either way, it should be an entertaining driving machine. Until we learn what’s in store, let’s pour one out for the EJ20.