4BT3.9 Cummins Fuel Filter 3930942/FS1280 Parts Catalog Ref No. Part Name Part No. Required 　 Fuel Filter Head 4989116 1 1 Fuel Filter Head 4989115 1 2 Ball 3897329 1 3 Filter Head Adapter 3936337 1 4 Hexagon Flange Head Cap Screw 3900632 1 5 Regular Hexagon Jam Nut 3903293 1 6 Fuel Filter 3930942 1 7 Rectangular Ring Seal …