Product Description
FASS STK5500B DIESEL FUEL SUMP KIT WITH SUCTION TUBE UPGRADE KIT
The FASS STK5500B combines FASS’s no-drop tank sump bowl with a 5/8" convoluted suction tube upgrade to cure common 1/4-tank starvation and improve fuel supply to high-demand systems. The “B” kit is designed to work with an existing bulkhead fitting and keeps all lines inside the tank for a clean, protected install.
Fitment & System Notes
- Applications: Universal — Ford Powerstroke, GM Duramax, Dodge/Ram Cummins, and other diesel fuel tanks.
- Design: Lowers suction point to the lowest spot in the tank; draws from inside the sump bowl (no external lines).
- Use case: Ideal when you already have a FASS bulkhead installed (e.g., STK1002) and want to upgrade to a sump draw.
- Material: 6061-T6 billet components with sealing hardware for leak-free service.
Installation & Manuals
View FASS’s install guides here: FASS Installation Manuals. Direct PDF for this kit: STK-5500B Installation Manual (PDF).
Specifications for Fass STK5500B
| Brand | FASS Fuel Systems |
| Part Number | STK5500B |
| Kit Contents | No-drop sump bowl + 5/8" convoluted suction tube (for use with existing bulkhead fitting) |
| Material | 6061-T6 billet aluminum components |
| UPC | 850044106936 |
| GTIN | 0850044106936 |
| Shipping Info | Ships ground; typical handling 1–2 business days (transit times vary by destination) |
| Prop 65 | Yes — Cancer and Reproductive Harm |
