Of course there are new Mustangs, and the Roush kit New Mustang..................... Under the bonnet is the ‘Roush-charged’ 5.0lt V8 that claims 670 horsepower (492kW) courtesy of the Roush Performance R2300 TVS supercharger. According to Dean, with the right driver and tyre combination, a ten-second quarter-mile elapsed time is a real possibility. And if that isn’t enough grunt under your right foot you can always tick the optional 727 horsepower (534kW) box. The 2017 RS3 Mustang comes with a seven state and territory legal ADR engineering compliance and is backed by a three-year/60,000 limited warranty.