Central to the conversion is an R2300 ROUSHcharger supercharger plus intercooler, which lifts power from 412 bhp (307 kW / 417 PS) to 540 bhp (402 kW / 547 PS). Torque from the 5.0 litre V8 engine is similarly increased, rising from 528 Nm (390 lb/ft) to an impressive 630 Nm (465 lb/ft).
Roush doesn’t offer a choice of transmission, though. Drive to the rear wheels is via a six-speed manual gearbox, and there’s no automatic option.
Costing $16,800 in the US, the Stage 3 package includes a Roush suspension system. This replaces the springs, anti-roll bars, rear dampers and front struts, while adding jounce bumpers and an anti-wheel hop kit for better traction. Additionally, 18” Roush chrome wheels with Cooper tyres are fitted, and the original exhaust is ditched in favour of a square-tip performance item.
The Mustang’s appearance is beefed up by a new front valance, chin splitter, boot spoiler and side skirts. Buyers get to select from eight paint colours, six stripe colours and six stripe accent colours. That’s a total of 288 different combinations so, provided a bit of imagination has been used when specifying the car, the chances of coming across an identical one should be extremely slim.
For those wanting to tweak their Mustang further, the Roush options list is the place to look. It includes louvered panels for the rear side windows, leather upholstery, 20” wheels, competition suspension and three different brake upgrades.
Available from dealers at the end of this month, the 2012 Roush Stage 3 conversion comes with a three-year / 36,000 mile warranty.
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