Group 81: Primary Fuel Filter, continued Variation 81BN, 81D2 Optional Agency Approval Installed Items. See Accessories Section for additional parts.Item Part Description Variation Number Quantity 1 -- Fuel Filter 1 2 GM50241 Fuel Pump 1 3 GM77149 Seal Kit 1 4 GM50107 Fitting, adapter 2 5 GM50115 O-ring 4 6 360165 O-Ring 5 7 GM50263 Fuel Filter Kit (includes primary and secondary filters) 1 8 GM50193 O-ring 1 9 GM91975 Filter Bowl 1 10 GM52830 Drain plug 1 11 GM50114 O-ring 4 12 GM84091 Sensor 1 13 GM30375 Flange Nut, M10 2 14 GM91976 Filter 1 15 223458 Drain Plug 1 16 GM50263 Fuel Filter Kit (includes primary and secondary filters) 1 17 223466 O-Ring 1 18 360556 Elbow Fitting, 45 deg. 1 19 GM50292 Fitting plug 1 20 GM50230 Sensor 1 21 GM50106 Fitting, adapter 1 22 GM50280 Bleed valve 1