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Old 01-01-2012, 06:51 PM   #1
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Alpine Owners Club
Join Date: May 2008
Location: Chatsworth CA
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Air Filter for ISL 400 in 2007 34FDDS

I need the correct p/n for this filter. In an old post, Engineer Mike says AF22249 but Filterbarn does not recognize this number.

My two cents on oiled filters such as K&N: Been off-roading for many years and have used K&N filters for off road and on road vehicles. The problem with using an oiled filter on-road is that they don't get enough dirt and the oil gets sucked through pretty fast. Off-road, they get clogged fast and so you clean and re-oil them often. I was surprised to find a dry and quite porous K&N on my motorhome after a few thousand miles. I now use dry filters both on and off road.

Rick J Fisher, BW is Judy
2007 Alpine 34FDDS Limited SE
2003 Jeep Rubicon or a 1995 Toyota Tacoma
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Old 01-01-2012, 08:38 PM   #2
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No info on the K&N.

There should be a number on the old one, if it's not to be found. I can look at my records, it should be the same as mine.

Monty & Janet - 2007 Alpine APEX 40 MDTS
S/N - 75715 - Retired - Master Certified RV Tech
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Old 01-01-2012, 09:41 PM   #3
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I think the correct filter number is AF25549. At least that is the number for my '04 with the ISL 400, and the number I found in one of EngineerMike's previous posts. I got mine from Ryder Fleet Products.
Jim A
'04 Alpine Coach 36' MDDS
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Old 01-02-2012, 07:45 AM   #4
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Originally Posted by Jim A View Post

I think the correct filter number is AF25549. At least that is the number for my '04 with the ISL 400, and the number I found in one of EngineerMike's previous posts. I got mine from Ryder Fleet Products.
I have a FillPro & Fram cross ref but stick with the Fleetguard filter. Why take a chance on a dusted engine. Ryder Fleet Products excellent source:
Basil & Sue Shannon
Former Apex owner (Gary & Renee have it now)
Was Traveling Circus (2 clowns/Sage the Wonder Dog) Tent rotted. Circus folded.
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Old 01-04-2012, 08:13 PM   #5
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Been in the heavy duty filter distribution business for over 30 years. The short answer is dont use anything but a dry pleated paper element in the filter housing that was included with your coach. They work very well and will be sure to not "dust" your engine.
Ross Starkenburg
2005 Holiday Rambler Navigator 43PBQ w/detroit 60 series, 2015 Jeep Grand Cherokee toad
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