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 ...

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 ...

Subaru WRX STI : Engine has “reached the highest point” Subaru admits that its EJ25 engine utilised in the soon to be release Subaru WRX STI has all but reached its full potential. Alborz Fallah 11:44 ...

When Subaru announced it was bringing an S-series WRX STI to the US for the first time, we wondered what engine would power it. A turbocharged boxer-four, obviously, but the Japan-only S208 used a 2.0 ...

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 ...