Premeiring at this year's SEMA Show is a 1970 Ford Mustang Boss 302 built by SpeedKore under the guidance of Robert Downey Jr himself. SpeedKore says that the actor was there providing progress and insight during the vehicles build process.
The form was kept true to the original design to mantain its classic look, with the exception of a new set of HRO wheels. Where the true beauty of this modified muscle car are underneath.
The Mustang Boss has been outfitted with carbon fiber body panels in an effort to reduce weight; This pairs nicely with the Detroit Speed aluminium frame and suspension.
As for the engine compartment, a Ford Performance Aluminator 5.0-liter V-8 with a Stage 2 Ford Performance/Roush supercharger takes center stage under the hood. All that power is sent to the back wheels by a Bowler T56 transmission and 9-inch Ford rear differential.

The interior had its own fair share of improvements. Custom brown leather, a one off steering wheel, and an air conditioning system by Custom Air. The different parts and sections inside preovide an professional and sleek look akin to that of Tony Stark.
Its always interesting to discover that you share an interest with a celebrity. The difference here is that Robert Downey Jr can afford to persue those interests to the max.