I hear a lot about these, but honestly my impression is they might be a waste of time and just one more thing for novice mechanics to bond over while installing them on their hemi. People are recommending them for every hemi illness and on the Hemi Shop Talk page on facebook they are even rumored to cure aids and erectile disfunction.


With that said, is there anyone here that has a success story with them with legit benefits worth the energy to install said mod?

 

Couple of threads on the subject. Here's one.


https://dodgeforum.com/forum/3rd-gen...catch-can.html