The Ford Mustang now has a range of performance enhancing kits, available for the 2.3-litre Ecoboost and 5.0-litre V8 variants in the US.
Ford’s performance pack for the Ecoboost Mustang brings its total power up to 335bhp from 310bhp, but the biggest gain is the 70lb ft leap in torque – with the pack fitted, the Mustang will have 390lb ft on tap.
Gains at specific points within the Ecoboost engine's powerband are more substantial, with an extra 100bhp now available at 6,000rpm. On average, there’s 40bhp more with the pack fitted, and 60lb ft-plus extra between 2,500 and 5,000rpm.
Meanwhile, the 5.0 V8 Mustang GT gets three different performance kits. The mildest of these adds 13bhp and 16lb ft, and the mid-range pack provides 21bhp and 24lb ft. The most potent kit provides a power hike of 37bhp and 5lb ft, and extends the engine's redline to 7,500rpm.
The most basic kit for the V8 engine costs from $599, which is about £487. The most comprehensive of the V8's power kits consists of upgraded air filters, cold air intake, throttle body and an intake adapter from the Shelby Mustang GT350, and costs $2,395 - about £1946.