Ya talked me into looking for one for my car. Which one would you recommend? And, should I be worried about cleaning my intake path on my 5.7 with 20K highway miles?
I recommend the Billet Technology catch can. This is what I have on my SRT. It costs $95. With only 20K miles, I wouldn't worry about cleaning your throttle body. https://www.custombilletstore.net/Hemi_Oil_Catch_Can_p/20010.htm
catch cans don't do squat for HP. all it does is keeps your PVC system free of the used oil that passes through it, I had one on my 2009 SE with the 3.5L and it worked like a charm.
You're correct, a catch can doesn't add horsepower, but it keeps your engine from losing horsepower due to pulled timing.