I've just had Doug @ ADT install my Towing Twins along with 0-ringing and head freshening. I had the side cover replaced at the time of my new short block this past Dec. to relocate the breather from front to side. Above 50 lbs. boost it really pukes oil,like there is no baffling in it at all like I see on the front breather. I've since reconnected the front breather so I can use both,just curious what others have experienced. Thanks,Dave.