Four cylinders, direct injection, a thumpin’ great turbocharger, and lots of reliability problems. The 2.3-liter EcoBoost in the Focus RS has its ups and downs, but in the hands of Mountune, this ...

You'd need more than one hand to count the Ford models that didn't come to the States, and that still applies when focusing on the athletic offerings. We were robbed of gems like the Ford Escort RS ...

As far as power goes, the trickiest vehicle layout to deal with is front-wheel-drive. As the front wheels also take care of the steering and the majority of the braking, asking them to also deal with ...

2017 Ford Focus RS in Stealth Grey with 38,538 miles. Clean title, second owner, and garage-kept with no accidents. Upgraded with a Mountune N1 engine at 23K miles, producing 450 HP at the crank.

Established aftermarket shop Mountune recently posted a YouTube video of a 2.3-liter Ford Focus RS engine making insane power numbers on a dyno, showing that this tiny four-cylinder produces enough ...