Reusable engine air filters for the Robinson R44 and R22 are now available from Donaldson Aerospace & Defense. The Donaldson Co. division is offering the filters through Robinson’s parts network, with part number P625364 (B771-1) for the R22 and P625370 (B771-2) for the R44. The filters are replacements for automotive-style filters. According to Donaldson, the filters are capable of operating in conditions from -40 to 200 degrees.
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