Buy Caterpillar 7N3921 - FUEL FILTER at wholesale prices with easy payment and fast shipping options. Save up to 50% OFF OEM pricing. Compatible Machines:- ENGINE - MACHINE- WHEEL-TYPE LOADER Compatible Models:- 3304- 3306- 950- 966C Units Containing The Spare Part :- FUEL FILTER (7N3921 N/S) (3306)- 7N3594 BASIC ENGINE ARRANGEMENT--Part 2 of 2 (3304)- 7N3601 BASIC ENGINE ARRANGEMENT--Part 2 of 2 (3306)