THE feisty Ford Focus ST is getting more punch with a performance upgrade from engine specialists Mountune.

The Mountune treatment increases power from the ST's 2.0-litre EcoBoost engine from 250 to 275ps and shaves more than half a second off its 0 to 60mph acceleration time at 5.9 seconds.

The upgrade kit comprises a large capacity alloy intercooler, low-loss cast crossover duct with silicone hose, high-flow dual-entry air filter and specially developed performance-map calibration.

Its produces a 10 per cent increase in maximum power output at 5,500rpm, but also an improvement in torque from 345Nm to 400Nm at 2,750rpm adding extra bite to mid-range acceleration.

The five-door Focus ST costs from £22,495 while the Mountune kit adds £1,195 to the price and when fitted by Ford dealers does not affect the vehicle warranty.