2012 Dodge Ram 2500
Unless I'm missing something the part number for a 2012 shows FS43255. When I go to the Fleetguard website and put in that number (FS43255) it tells me the replacement/upgrade is FS53000. I can't believe their catalog is wrong? I haven't had issues getting mine to seal and the filter does not come out clean. My theory is the seal / O-ring around the base is what does the sealing and not on the shape of the hole in the bottom. I used a Wix for my first change before understanding the importance of fuel cleanliness and the hole in the bottom of it was huge compared to either of the Fleetguard part numbers.That’s the way I see it. There’s a reason the catalog doesn’t supersede the later filter to older applications. The later models have an oval shaped opening in the bottom while the 11-12 have a rounder shape. If the new filter was simply of a better filtration rate the previous filter would be discontinued. The filter needs to lock into the bottom of the housing to seal properly. Compare the two and it’s obvious.
I have been using the FS53000 for 2-1/2 years now. About a year ago I added the throttle up kit. My under hood filter is even cleaner now.
Just my $0.02