Real world driving, I seriously wonder if all the mods people do are worth it:
here's my 2013 5.0 rspec totally stock:
http://youtu.be/YzrV9t-au-c
and here it is again with magnaflow, MSA cat deletes, CAI, and the nanny defeat trick:
http://youtu.be/5cU71isO-kk
I will probably put the...