Mountune has produced a performance upgrade kit for the Ford Focus RS that increases its power output to 370bhp and torque to 376lb ft.
That’s a gain of 25bhp and 52lb ft of torque for the car’s turbocharged 2.3-litre engine, shortening its 0-62mph sprint time to 4.5sec – two tenths of a second faster than before.
This brings the RS into close contention with the more expensive Mercedes-AMG A45, which completes the same the sprint just three tenths quicker but slots into the class above, costing from £40,000.
Mountune’s RS kit includes a high-performance air filter, bespoke alloy crossover duct with high-performance silicone hoses, an upgraded air recirculation valve and revised software tuning for the car's ECU.
Fitment of the parts can be carried out by any Mountune-approved Ford dealer. The job is said to take just an hour and a half, for a total cost of £899. Therefore, added to the Focus’s £31,000 entry-level price, a Mountune-spec RS will cost £31,899.