Stock 2016 Mustang GT manual trans. about 380rwhp on dyno.- Stock 2016 Mustang GT350 about 480rwhp on dyno. Stock 2015 Roush Mustang Stage 3 dyno test at Ray Skillman Ford came out 27hp over advertised@ 697fwhp 606rwhp. Stock 2015 Roush Mustang Stage 3- 1/4 mile run on YouTube 10.47sec@132mph...