CHICHESTER, UK – The Prodrive P25 made its public debut last weekend at the Goodwood Festival of Speed, and while there, Prodrive Chief Engineer Richard Thompson took us through some interesting ...

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 ...

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 ...

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 ...