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I have been researching air filters recently for my '58 444. I discovered that K&N has a custom filter assembly for my SU HS4 carbs, part number 56-1390 as shown below:

It is pretty basic with chrome top and baseplate, but as the site says these assemblies come with the famous K&N High-Flow Washable Air Filter. I have been very pleased with these filters in the past. I can get this setup for between $40-50 each plus shipping.
Another option is to get the "Volvo style" air filters for $71.66 each from Olof. I'm not sure of the details on these but do not think they are reusable.
I also believe that the RamFlow 300 CFM Series filter setup will work for the SU HS4 carb, for around $50 each.
I think there is also an ITG filter setup for the SU HS4 carbs.
What filter setups do you other SU HS4 carb guys like? What other options are out there for us? Is a one-box setup available? What about stainless base/top plates?
Thanks in advance.
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Tony1958 P444 (44408), ID 187797 : See site for info 2000 V70XC AWD/SE Visit Scarola's PV Register
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