ROUSH Performance is excited to announce final horsepower ratings for the all-new 2015 ROUSH Stage 3 Mustang. The RS3 is cranking out a heart-racing 670 horsepower and 545 lb-ft of torque to deliver the ultimate driving experience. All 670 horsepower are created as a direct result of the powerful combination of Ford’s 5.0L V8 engine with ROUSH Performance’s dynamic new 2015 2.3L TVS supercharger. The ROUSH R2300 TVS supercharger is a roots-type, positive displacement supercharger that features twin four-lobe rotors that are twisted 160-degrees. By comparison, the original Eaton supercharger rotating assembly featured three lobes twisted 60 degrees. The fourth