Motor Trend

Project Subaru EJ25 - Part 1

Overboosting. A turbocharged engine's worst nightmare and root of disaster that claimed the life of millions of healthy engines around the world. Rewind the clock back to 2010 when my '05 Subaru ...
https//carbuzz

Subaru EJ25 Engine: Why Subaru's Turbo Flat-4 Will Go Down As One Of History's Greatest Motors

Michal studies Automotive Journalism at Coventry University in the UK, and has been writing for CarBuzz since March 2025. He was nominated for student culture piece of the year recently and has been ...
autoevolution

Subaru Still Believes In EJ25 Engine

Although fans and owners of the WRX STI hoped that Subaru would offer the 2.0-liter turbo flat-four in the STI S209 for North America, the Ebisu-based automaker didn’t make their wish come true. The ...
Motor Trend

Project Subaru EJ25 - Part 2

Since we last left off with our Subaru build, we repaired and upgraded our EJ25 cylinder heads with a set of Kelford R-199-B (264/260 duration) camshafts and Supertech valvetrain, and got the head ...