Are the Shaker hood systems from CDC any good?

[Hp Mustang]

I think they look awesome, but I've never heard anything about how much power they add. Right now I have a BBK cold air intake in my Stang, will the shaker hood put out more power, and if so how much?
Thanks.

BOSS 429

 

[Enzora]

Nah, the shakers are just functional enough so people with them can proudly claim, "hey, at least my hood scoop isn't fake!" They're mostly just for looks.