Manufacturer-sanctioned modifications aren't all that common here in Australia (unlike Europe, the USA and Japan), but Ford has become one of the few companies in the country to announce full support for a range of aftermarket tuning parts.
Developed by UK company Mountune, the Fiesta ST MP215 package and Focus ST MP275 package help stuff more air and fuel into the motors of Ford's two hot hatches and bring a new ECU tune to control it all. The gains are significant.
For the Fiesta ST, the MP215 pack takes output form a stock 134kW/240Nm to an even healthier 162kW/320Nm (measured on 98RON premium unleaded fuel).
Costing $2328, it includes an aluminium airbox and high-flow air filter, new inlet piping, a revised engine tune and an mTune handset to help tailor the tune.
The best part: it takes around an hour to fit, it's a Ford Licensed Accessory and comes with a full Ford-backed warranty.
The Mountune MP275 package for the Focus ST is a little more serious and takes about two hours to install, but with a new aluminium intercooler, high-flow air filter and a more aggressive fuel/air map for the engine's electronic brains it will take the Focus ST from 184kW/345Nm to 202kW and 400Nm.
Retailing at $4135, the MP275 pack brings the total cost of a Focus ST to $43,125.
The Mountune upgrades are the first products to be sold under the Ford Licensed Accessories program, and are warranded for the full Ford new vehicle warranty (three years, 100,000km) if fitted to a car at the time of sale.
Retrofitted kits will be covered for the remainder of the vehicle's factory warranty or 12 months/20,000, whichever perioud is longer.