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These are the first pictures of the world's most hardcore Mustang.

The Roush 427R Trak Pak Mustang takes the legendary Pony Car to the limit, and has been designed with trackdays in mind.

But just 100 super 'Stangs will be up for grabs when it goes on sale in the summer.

• The 427R is fitted with a 'ROUSHcharger' supercharger, boosting power to a massive 435bhp and pulling muscle to 400lb/ft
• Beefing up the looks are a menacing front bumper, side skirts and a fully-adjustable carbon fibre rear wing
• Roush has comprehensively upgraded the suspension to handle the extra 115bhp, which can be manually adjusted to 'set up' the car for individual track conditions
• Stopping is handled by a set of enormous 14 inch brake discs, gripped by race-spec brake pads
• The Trak Pak Mustang even has a set of bonnet pins to stop it flying open at speed