Omix Gas Tank Small Filler Neck 41-42 Willys MB & GPWOmix proudly offers all the parts you need to keep your Willys Jeep running like new with quality standards that always meet or exceed those of the factory part. This replacement steel fuel tank fits 41 42 MB GPW models. It features the small filler opening, fuel line bung on tank bottom and a drain plug. Tank has 15 gallon capacity. Uses a 5 screw sending unit (17724. 23). For tank strap kit, use 12025. 28. Replaces OE A 1221 This Part Fits: Year