News Source: topspeed.com

An auto show as big as SEMA  is bound to have some cars that fall through our cracks. But hey, better late than never, right?

At its core, this is a 2014 Ford Mustang  , but once you add in all the layers, including the work put in by Mustang  tuner extraordinaire Roush Performance, this Mustang is turned into a pretty ridiculous racecar  that’s been dubbed the 2014 Roush Performance Mustang RS3 for Road Racing World Challenge.

Beginning next year, this fantastic racer will be part of the grid at the Pirelli World Challenge series’ GTS class and Roush Performance really went to town to ensure that it has the performance credentials to be a serious contender in the racing series.

The most noticeable upgrade is definitely the aesthetic work, which includes a new livery that was created as an homage to Jack Roush Jr.’s personal track car. A slew of aerodynamic enhancements were also given to the Mustang, highlighted by the massive rear wing and a colorful set of wheels that really add to the explosive color of the muscular racer.

But the real highlight of this Mustang racecar is the extensive engine upgrade Roush Performance put into it. Using its Stage 3 Mustang package, which includes an R2300 supercharger with Eaton Twin Vortices Series (TVS) technology and Roush’s High-Efficiency Intercooler, and an OE-level PCM Calibration, the tuner was able to increase the car’s output to an impressive 575 horsepower and 505 pound-feet of torque.

Add a Ford Racing "Aluminator" Engine and a Phase 2 program and the output increases to 625 horsepower. A similar addition, but this time with a Phase 3 program and you’re looking at an output of 675 horsepower, more than enough, we reckon, to be a serious competitor.