In a stage 2 setup the Fiesta ST is typically pushing close to 250 hp. The car has either full bolt-ons, rmm, and a custom tune or it has a package installed from COBB or Mountune. These kits do not mention the factory warranty and are pushing a more dangerous amount of power out of the tiny 1.6L engine. The Mountune MR230 package plus a bolt on or two will provide these numbers and truly some impressive power.
A 2700 lb car going from 200 hp to 250 is a massive leap in power to weight ratio, bringing it almost to the level of a Lotus Exige. Stage 2 cars can expect medium amounts of maintenance but if done right and not constantly pushed to the limit can still provide a decent daily driving experience.