What is it?
This is a dealer-fit engine and exhaust upgrade for the Fiesta ST. For £1838 (plus fitting), you get an upgraded induction kit, a very naughty-sounding exhaust, a tweaked ECU, and new camshafts and valve springs.
The result is 183bhp – not bad for an engine with no turbo or VTEC-style trickery. You can also buy a 163bhp version that does without the upgraded camshafts and valve springs for £1435.
What’s it like?
Loud. Start it up and the trumpet-shaped exhaust settles into a gruff, slightly flatulent idle. This is not a car for refined, shrinking–violet types.
Move off and you’ll notice a sharp clutch action and a paucity of low-down torque. But you forget the trickiness of the drivetrain once you wind the little Fiesta up a bit.
Beyond 4000rpm, things start to get properly exciting. The bubbling exhaust note hardens into a menacing growl, and you can hear the high-flow induction sucking ever more air into the cylinders.