Here it is, sounds I would say 90% factory, this is after I removed the Post cat O2s and change the cold fueling tables. Listen for yourself, again hard to hear and I dont want to drive it like that until I get a catch can. I think a single catch can setup would work just fine in our setup. I doubt your going to have enough blowby to warrant a big dual can setup. But again it would be nice to hear from one of the guys who deal strictly with this engine.