I am looking to buy a catch can only problem is that there are very many catch cans to choose from. 1.) Does it matter which one I get. 2.) Is the install a pain in the a$$. 3.) Does it really make a big difference. I read a thread about them and saw some gross stuff come out of an engine, but does this really help. I also heard a rumor it helps little bit with smokey turbos. Thanks for any input.