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I have read maybe 2 posts of people running 2 catch cans.
One in the standard PCV location
and the other in the line from the Valve cover to the throttle body (fresh air line) on a LS1
....and those people claim the get allot of oil from that fresh air line.
How come there arn't more people running the second catch can???
Or if you're out there , plese chime in and let me know how good that 2nd one works.
This set up has come to light, mostly because some of our FI customers run a second can for the passenger side valve cover because they have problems with the oil dip stick popping out of the block.
There are several that run 2 cans in series to further reduce the oil in the manifold.
and finally, a lot of people just do it because it looks cool...