I replaced my OEM Mopar filter with the CAT conversion over Labor Day weekend with no problems, just follow the instructions and make sure everything is cleaned and snugged up well.
I don't know why people are paranoid about voiding their warranty if you have any fuel system related issues. Why wouldn't this be covered under the Magnus-Moss act, for an after market part? You've got to be kidding me, if switching out an adapter can void a warranty. Then what about anyone who has done the Fumoto drain valve? If anything you can just swap it back, but I run B20 anyways so whatever, I broke the ridiculous B5 rule long ago.
DCX can't void your warranty say on a broken window actuator for doing a CAT fuel conversion under the hood.

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06 Jeep KJ CRD Sport full Mopar skids, front tow hooks, rear hitch shackle, Magnaflow muffler, Samco Sport CAC hoses, 02 Airbox mod, Unique series 42 steel wheels.

The only 2 fuel filter craters on record occurred with a non-OEM filter that had a smaller micron size element.

My concern would be that additional pressure drop acroos the element would occur that could cavitate the suction of the fuel pump.

No fuel means no lubrication.

Until someone shows me a problem from dirty fuel reaching the injection system I am staying OEM.

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2005 CRD Limited, Black 205k Miles (Timing Belt Changed at 100k and 200k), GDE Eco-Tune, Carter in-tank lift pump
2005 CRD Sport, Black - Ingested Valve at 170k miles R.I.P.

When it comes to fuel related issues, the dealer is going to screw you on that one no matter what - if they can write it off to contaminated fuel, you're left holding the bag with your only recourse being trying to recover the cost of repairs from the fuel supplier - no matter if you're completely stock, have a Cat filter screwed on, or are running something completely different such as a Racor or Stanadyne.

I've had too many problems with the stock head and filter, and with the local fuel supply, to not do SOMETHING. If it was a choice between them voiding my warranty on the fuel system, or one day looking at a $10K repair bill to replace the injectors and CP3 pump and having to spend god knows how long trying to get my money back from the fuel supplier, it was an easy choice - when it comes to contaminated fuel, THE WARRANTY IS NONEXISTENT.

On one of the threads are pics of what came out of my fuel filters when I changed them recently. When I cut open the old filters and examined them, there was even more of this crud choking them. After having the same problem within just a couple days on my '87 MB, which hasn't been out of the local area, I have good reason to believe all this crud came from just ONE TANK of contaminated fuel - the station owner let his aboveground tank get too low before refilling, and sucked up rust and dirt off the bottom of the tank.

With what I flushed out of the fuel system and filters on both vehicles, there's no doubt in my mind that if I hadn't had an honest-to-god 5 micron New Holland filter on the stock head and a Cat 2 micron filter downstream of it, I would now be in the midst of the very scenario I laid out above.

Some of the finer particles made it past the 5 micron NH filter into the inlet of the Cat filter, but nothing in the outlet - that 2 micron Cat stopped it butt cold.

Even if you don't want to touch the factory filter in any way shape or form, get a basic filter head that you can screw the Cat filter onto, and splice it into the fuel hose downstream of the factory filter and tystrap it to something. If you're worried about what the dealer will say, just disconnect the hoses and pull it out of the vehicle before you take it in for service. Might be inconvenient, but less inconvenient than a 4 figure repair bill.

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Mitchell Oates
'87 MB 300D Diamond Blue Metallic
'87 MB 300D - R.I.P. 12/08
'05 Sport CRD Stone White
Provent CCV Filter/AT2525 Muffler
Stanadyne 30 u/Cat 2 u Fuel Filters
Fumoto Drain/Fleetguard LF3487 Oil filter
V6 Airbox/Amsoil EAA Air Filter
Suncoast TC/Shift Kit/Aux Cooler
Kennedy Lift Pump/Return Fuel Cooler