Roush Performance didn't waste any time getting their products for the 2015 Mustang to the public. The 2015 RS will be built on the Mustang’s V6 platform, the Stage 1 will feature the new turbocharged Ford 2.3-liter Eco-Boost engine, and the Stage 2 will showcase the naturally aspirated 5.0-liter V8.
Both Roush cars will boast bolt on modifications to give …
