Product Description
FASS STK1003 DIESEL FUEL 5/8 IN FUEL MODULE SUCTION TUBE KIT INCLUDES BULKHEAD FITTING
The FASS STK1003 adds a high-flow 5/8" convoluted suction tube inside the factory fuel module and includes a machined 6061-T6 billet aluminum bulkhead fitting. Designed for use with FASS Titanium / Titanium Signature Series systems, it provides both a suction pickup and a return port to improve volume and help eliminate common 1/4-tank issues.
Fitment & Notes
- Applications: Universal — Ford Powerstroke, GM Duramax, and Dodge/RAM Cummins fuel modules.
- Important: Will not work on 2003–2004 Dodge applications.
- Use case: Ideal companion to FASS Titanium Signature Series lift pump installs to ensure unrestricted supply/return at the tank.
Installation & Manuals
Full instructions are available on the FASS manuals page: FASS Installation Manuals. Direct PDF for this kit: STK-1003 / STK-1003B Installation Manual (PDF).
Cross-Reference & Related FASS Items (CPP Diesel)
- STK1002 Suction Tube Kit — bulkhead kit (non in-module).
- STK1003B Upgrade Kit — converts an STK1002 to in-module pickup.
- Current FASS filters used with Titanium/Signature systems: XWS3002 Extreme Water Separator, PF3001 Particulate Filter, XWS3002XL, PF3001XL, FP3000 Filter Pack, FP3000XL Filter Pack.
FAQ
What problem does the STK1003 solve?It maintains consistent fuel pickup from inside the factory module and provides a dedicated return, improving volume and helping eliminate 1/4-tank starvation.
Is this required for all FASS Titanium Signature installs?
It’s strongly recommended for high-flow systems to ensure the tank side can keep up with pump demand.
Does it fit 2003–2004 Dodge Ram?
No. The STK1003/1003B will not work on 2003–2004 Dodge applications.
Specifications for Fass STK1003
| Brand | FASS Fuel Systems |
| Part Number | STK1003 |
| Material | 6061-T6 billet aluminum bulkhead fitting; Viton convoluted suction tube |
| Ports | 5/8" suction tube in factory module + dedicated fuel return port |
| Compatibility | For use with FASS Titanium / Titanium Signature Series systems |
| UPC | 850044106899 |
| GTIN | 0850044106899 |
| Package Dimensions | 16.00" W × 4.00" H × 10.00" D |
| Shipping | Calculated at checkout (small parcel) |
| Prop 65 | Yes — Cancer and Reproductive Harm |
