Mine are in the same location as Definitive's.
I didn't dyno before installation so I don't have any comparison.
They're the Race Ready ones. Installed by Alekshop.
I'm thinking about trying to wire them up to the engine speed (open at high RPMs, etc). I've got the electronics/programming knowledge to do it, I just don't know if they'll open/close fast enough for the effect to be any good.
Or maybe just setting it up to open when the M button is pressed