Mustang tuner Jack Roush continued his work with the S-197 II - 5th Gen Mustang (2010 to 2014), offering several levels of modification and trim:  Stage 1, 2, and 3, RS, 427R (only in 2010), and 5XR. Stage 3 is considered the "halo" of the offered packages, coming with a supercharged 540hp 4.6L V8, along with suspension, interior, and exterior modifications. Roush even offers upgrades to the V6-based Mustangs with the RS package, providing customers with aerodynamic and handling upgrades. For the 2015 model year, Roush would continue their modifications in the 6th Gen (2015 to 2022) Mustangs.