It’s been a busy couple of months for Ford’s EcoBoost-powered cars. On top of the Focus RS finally hitting the streets, the 2.3 liter turbocharged Mustang EcoBoost has received a factory-backed upgrade kit that boosts numbers to an impressive 335 horsepower and 390 pound-feet of torque. With all that action going on, you’d be forgiven for forgetting about the Fiesta ST — at least for now.
After all, the junior ST hasn’t seen any real upgrades since its introduction in 2014. But that doesn’t mean it’s still anything short of impressive. The flyweight hatch has a performance-tuned suspension, and its turbocharged 1.6 liter inline-four sends 197 horsepower and 202 pound-feet of torque to the front wheels via a sweet-shifting six-speed manual transmission. It may not be the quickest thing in a straight line, but it carves corners better than some cars that cost multiples of its $21K base price, and still ranks on the shortlist of the best driver’s cars in the world.
And yet, gearheads all over the world can’t help but long for an even hotter Fiesta, especially in light of the Focus RS. That car, with its 350 horsepower and pound-feet of torque, and cutting-edge torque-vectoring all-wheel drive system, is an affordable performance powerhouse. It isn’t likely that Ford has the RS treatment in the cards for the Fiesta — the Focus RS is far more complex than just some bolt-in mods, and it’s not likely the smaller car could handle them. So while we keep dreaming, Mountune’s new turbo upgrade kit for the ST is likely the best we’re going to get.
Mountune is an old pro when it comes to beefing up Ford powerplants, selling several directly through Ford Performance. The company already offers a similar kit for the larger Focus ST that gives the car a 23 horsepower boost. While that’s all well and good, the tuning kit for the Fiesta will boost power by a whopping 83 horses to 297 — just 13 short of a base EcoBoost Mustang. And that’s in a 2,700 pound, 13-foot long, front-wheel drive hatch with a performance suspension. If that doesn’t sound like fun, we don’t know what does.
Ken Anderson, president of the company’s American tuning operations confirmed to Autoblog that the kit will be available by the end of the year. Price and torque numbers haven’t been announced yet, but it will include a Garret-sourced GT2554R turbo to replace the stock items, and an ECU tune to handle the extra power. The larger turbo bolts right in where the stock one goes, and requires no modification to install.
One of the selling points for Mountune’s Focus ST kit is that it’s offered with Ford’s factory-backed warranty. There’s no word yet on whether the Fiesta ST’s kit will follow suit. We hope it does; 297 horsepower is a lot to send to the front wheels in a subcompact, and it would probably win over a number of owners who want to get a little more oomph from their STs while avoiding doing anything to void their warranty. Either way, we’re excited about a hotter Fiesta ST that can pull away from the competition in the corners, and then keep pulling on the straightaway.