Housing & filter assembly, 90 degree end, for 2 & 3 cylinder L/C engines, Part # 825118 Housing & filter assembly, straight end, for 2 & 3 cylinder L/C engines, Part # 825117 Filter only for assemblies 825117 and 825118, Part # 820263 Housing & filter assembly for 31 Gross HP‡ (540000) air-cooled V-Twin, Part # 809670 Filter for 809670, Part # 841497 Safety filter for 809670, Part # 821136