Oil cooler is a great mod.
I have a B&M oil cooler installed.
Cut oil temps by about 15-20 degrees.
If you do get one, make sure you get a thermostst that doesn't let the oil start cooling until after its warm.
Most are standard at 180 degrees.
The ERam is an electric supercharger.
It DOES work.
It is the only electric supercharger proven to work.
Do a search through the forums and you'll find all the info you need.
They are spendy at $300, and their gains are only at WOT, but could be worth it.