The Fiesta ST and Focus ST have been given power boosts by Mountune - Ford's official tuning partner. The kits, which can be fitted at any one of the 120 Mountune-appointed Ford dealers in less than 90 minutes, raise the Fiesta ST's power output from 179bhp to 212bhp and the Focus ST's output from 247bhp to 271bhp.
Costing £1,225 for the Focus and £599 for the Fiesta, the packages increase performance significantly, but because of Mountune's official status, both the Fiesta's and the Focus' three-year/60,000 mile warranty remain intact.
The Fiesta's 0-62mph time drops from 6.9 seconds to 6.7 seconds, while the Focus can sprint from 0-62mph in less than six seconds - more than half a second faster than the standard car. Torque outputs have swollen too - from 360Nm to 400Nm for the Focus and 240Nm to 320Nm for the Fiesta.
The Focus ST kit includes a cast alloy inlet duct (available in a silver or black finish), high flow air filter, larger intercooler and unique engine calibration. The Fiesta ST kit includes a remodelled air box with a secondary inlet, a high-flow filter and a tweaked ECU. The upgrade packs both go on sale in the UK from September.