Renntech R1 package
Installed one on my buddies GLE63s today and it hauls the mail. Thanks RENNtech. Nice package, blowoff valve, BMC air filters, and tune. The HTT is super easy to use, just chose stock or modified. Turn the key to position 2. Plug in the HTT, wait for the light to turn green and done! So much easier than the mygenius tuner.
To install the blow off valve it was pretty straightforward, I did have to loosen the oil lines and move them slightly, but almost no oil comes out in the process. About an hour to do it, could probably do it quicker if I did it again.