15+ Roush RS3 vs 13-14 GT500

stanger1

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It was a cold rainy weekend, so watched a lot of YouTube video's. So, there are some vid's talking about the 2015+ Roush RS3's running under 3.5 seconds 0-60, and running 10 second 1/4 mile times.
They are saying stock at the 670 HP.
Now I know they have a 727 upgrade, but these videos were on the 670 HP.
So, how can a Mustang with only 8 more HP, than our 13-14 GT500's run that much faster.
I think they both weigh about the same and we have wider tires, but we have that 3.31 gear.
Still, I don't see how the RS3 can be that much faster.
Are they smoking crack or what? LOL
Big plus if they blow up a motor as the 5.0 is a lot cheaper to rebuild.
Just seeing what everybody thinks.
Thanks
 

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