I would have thought anti drain back quite important on a dry sump engine which already has a reputation for wet sumping if not used regularly.
The anti-drainback valve in the filter is not an absolute seal, it also is only designed to hold some oil in the filter for startup. Wet sump is caused by the drain-back valve failing in the oil pump. Totally different issue.
As for the filtration, I'm a big oil analysis believer. We'll see what the results are of this batch of synthetic running through it.
I did initially try to order the S&S filters, but they're out. Even so, those are most likely manufactured by another company and S&S just prints their logo on it. I was shocked at how easily the metal deformed and punctured on the stock filter. What if hard road debris hits it? Yikes.
