You do realize that if the sealing area is all ruffled up, that BOTH sides will show the ruffles. It's impossible for one side to be all ruffled up and the other opposite side smooth.
As shown many times in these leaf spring discussions and light tests, if the leaf spring is smooth there isn't really any light leakage detected. Keep digging for excuses for poorly stamped ruffled up leaf springs, lol.
Both sides will be smooth. It's a sheet metal stamping, so if one side is smooth so is the opposite side. Show me a leaf spring that is smooth on one sided, but all ruffled up on the opposite side. You'll never find one like that.BTW your pic shows
This ???
That leaf spring has no ruffles ... the "sealing" surface is smooth. What are you talking about?From YOUR pic …Are these the “ruffles” you speak of then???
Not required per the bubble point test, and the bypass valve only comes along for the bubble point test ride if it's built into the end cap. Besides, he would have to rig up some way to put the assembled leaf spring pressure on it. The leaf spring in the OG Ultra he tested didn't leak, beause if it did the ISO efficiecny wouldn't be as high as his test showed.
It was an OG Ultra, go watch his video of the filters cut open and showing the construction.
The new media can be just as efficient, plus the new media uses a lot more total surface area. The Ultra was changed quite awhile ago, so the ones they tested probably has smooth leaf springs - leaf spring stamping haven't been ruffled up junk for that long. Once a new design configuration is tested and verified, they don't keep randomly ISO testing filters. So if a production QA snafu happens, like ruffled up junk leaf springs make it into filters, then they don't know unless they see it and care about it. Again, a filter media would have to be 100% @ 20u, and could not have any more than 1% or less internal leakage to still make 99% @ 20u.
You think the leaf spring even touches the end cap where those
ruffles are? 
Where's the logic. 
There’s no way you’re being serious here…..after all these threads you still don’t know the construction of oil filters???
Those are nicely made ruffles. Most other pics here are too blurry. It has been talked about here, not just by me, about the protrusions on the spring hold the spring up. From my actual observations, much worse than a ruffle. Actual is always better than a pic. Some end caps have the protrusions instead of on the spring. Those might be better, but maybe not.
