Upr is probably the easiest, the jury is still out on which one is the most effective.
I'm currently running the RX OCC with great results, but the install is definitely more involved.
i was very conscious of where i put my can to keep it discrete on dealer visits. i've had it in 3 times for service and never a word about it. full details here
http://www.ecoboostperformanceforum.com/index.php?topic=7370
Ok, my UPR catch can is installed. For those who have this catch can, has anyone installed a valve in the bottom to make it easier to drain during maintenance? I'd really like to install a valve and a tube running down near oil drain so I can just have it going in the catch for the waste oil.