Product Description
FASS STK5500 DIESEL FUEL SUMP KIT WITH BULKHEAD SUCTION TUBE KIT
The FASS STK5500 combines a no-drop fuel sump with a bulkhead suction tube kit so you can pull fuel directly from the sump bowl inside the tank—no external fuel lines. The design lowers the suction point, gathers fuel to a central location, and helps eliminate common “quarter-tank” starvation issues on hard-working Ford, GM, and Dodge/Ram diesel trucks.
Fitment & System Notes
- Applications: Universal use on light-duty diesel tanks (Ford Power Stroke, GM Duramax, Dodge/Ram Cummins), with or without a FASS lift pump.
- Works great with: FASS Titanium Signature Series and Titanium Signature Series PLUS fuel systems for higher-flow builds.
- What it does: Lowers suction location and draws from inside the sump bowl via the bulkhead & convoluted suction tube—no tank drop required.
- Porting: Sump exterior fuel-line port for simple hose routing with FASS systems; bulkhead kit allows suction from inside the tank.
Installation & Manuals
Get step-by-step install instructions from the official FASS manuals portal: FASS Installation Manuals.
Cross-Reference & Related FASS Items (CPP Diesel)
- STK1002 5/8" Suction Tube Kit w/ Bulkhead — standalone draw-straw option.
- STK1005 Bulkhead & Viton Suction Tube Kit — alternative bulkhead assembly.
- STK5500B Sump Kit w/ Suction Tube Upgrade — upgraded variant.
- Popular FASS fuel systems to pair with a sump: TSF16250G (250GPH) 6.4L Power Stroke, TSF16165G (165GPH) 6.4L Power Stroke.
FAQ
Do I have to drop the tank to install STK5500?No. This is a no-drop sump design intended to install without removing the factory fuel tank.
Will this help with “1/4-tank” fuel starvation?
Yes. By lowering the suction point and drawing from the sump bowl, the kit helps prevent typical quarter-tank starvation issues.
Can I use this without a FASS lift pump?
Yes. It’s universal. That said, the kit is designed to integrate cleanly with FASS Titanium Signature systems for higher-demand builds.
Are there external fuel lines hanging under the truck?
No. When plumbed to the bulkhead suction tube, fuel is drawn from inside the tank—no external lines.
Specifications for Fass STK5500
| Brand | FASS Fuel Systems |
| Part Number | STK5500 |
| Includes | No-drop sump assembly, bulkhead fitting, convoluted suction tube, hardware |
| Material | 6061-T6 billet aluminum (major components) |
| UPC | 850044106929 |
| GTIN | 0850044106929 |
| Shipping | Free Shipping (Continental U.S.) |
| Package Dimensions | 6.0" W × 6.0" H × 6.0" D |
| Prop 65 | Yes — Cancer and Reproductive Harm |
