What's the total media area? You should see the size of the filter they used on a 3.5L V6 Infinity done at a quick lube shop ... it was literally the size of the small cartridge oil filter in my single cylinder 300cc motorcycle.
That I'm not sure, I didn't cut the media out of the filter to measure it. I'm sure it is plenty adequate for the application, just seemed small since my Jeep takes a PH16 sized filter, and I've been using PH3614 sized filters on lawn mowers.
You should do a bypass piece seal area light test on that one. Nissan specs the shorty 6607 for many/most vehicles. I'd bet the 7317 would work just fine in that application.
Just did the light test on it, and no light leakage seen. The leaf spring fits snug and tight in the end cap. I put a 7317 size filter on it after this filter. It was 2-3 times larger in size.
Curious if that filter has raised protrusions/nubs either on the endcap or the bypass piece? If the 7317 was "2-3times" larger, no idea what that filter equivalent is. 7317 only ~3/4" longer than a 6607.
Here's a few photos I just took. The leaf spring seals on that raised ring around the center tube on the end cap, and the mating surface on the leaf spring looked flat. Probably as good as it gets for a metal-on-metal seal. This filter was installed by a quick lube place ... think it was a "Service Champ" or some other odd-ball brand name - looks like a Champs Lab build. I threw the can in metal recycle a while back. Not a bad construction, but it was super small compared to a Fram 7317 sized filter.
My MP 7317 had/has the raised ring too, but the ring on the MP 7317 I c&p apparently not enough to overcome the space created by the protrusion on the bypass piece. Those raised points were the dark areas on the seal. And there's only so much force one can put on that flat spring before it starts bending out of shape. That would be wayy more than just a closed uncut can. Perhaps the raised nubs on yours not a pronounced. Anyway, I'll be curious to see the how FE7317 does for me, will post pics.
Those "raised nubs" on the sides of the cylinder piece that goes down into the end cap hole don't interfere with the sealing between the raised ring on the end cap and the smooth matching surface on the bottom of the leaf spring.
Apparently not on yours. On the MP7317 pretty confident it was/is a factor in what I saw with the light ring. Having used and c&p several of same Champ design (MP7317 latest) very familiar with it. No pics necessary. My pic of the MP7317 seal area found similar to WCW. We'll see what FE7317 shows. Fwiw, I like the MP series and FE series filters, so the seal area findings are/will be exactly as found.
On my example, it looks like the raised ridge around the center tube on the end cap contacts the bottom of the leaf spring all the way around - no sign of any light leakage, I just double checked it in a totally dark room with a strong LED flashlight inside the center tube.
