Product Description
FASS STK1002 DIESEL FUEL 5/8 SUCTION TUBE KIT WITH BULKHEAD FITTING
The FASS STK1002 Suction Tube Kit adds a high-flow 5/8" suction tube and an integrated 1/2" return port through a billet bulkhead fitting. This upgrade increases fuel volume to your FASS lift pump, eliminates filler-neck drilling for the return, and speeds up installation while helping prevent 1/4-tank starvation issues.
Fitment & System Notes
- Universal applications: Ford Powerstroke, GM Duramax, and Dodge/Ram Cummins fuel tanks (user-trimmable PTFE tube for tank depth).
- Works with FASS lift pumps including Titanium & Titanium Signature Series (select your system’s flow to match engine power).
- Return routing: Built-in 1/2" return port on the bulkhead simplifies plumbing—no cutting of the filler neck.
- Material: 6061-T6 billet aluminum bulkhead; PTFE suction tube.
Installation & Manuals
See official FASS install guides here: FASS Installation Manuals.
Direct PDF for this accessory: STK-1002 Installation Manual (PDF).
Cross-Reference & Related FASS Items (CPP Diesel)
- Alternative suction tube kits: STK1003 (Fuel Module kit), STK1003B (Convoluted tube upgrade), STK1005 (Viton tube).
- Popular filters for current FASS systems: XWS3002 Extreme Water Separator, PF3001 Particulate Filter.
- Example high-flow system pairing: TSF16250G 250GPH System (6.4L Ford).
FAQ
Do I have to cut my filler neck for the return line?No. The STK1002 bulkhead includes a 1/2" return port so you can route the return through the tank top instead of the filler neck.
Will this help with 1/4-tank issues?
Yes—properly installed, the 5/8" suction tube helps reduce aeration and starvation near low fuel levels.
Is the suction tube length adjustable?
Yes. The PTFE tube is designed to be cut to match your tank depth. Follow the installation manual for measurements.
Which filters should I pair with my current FASS system?
For modern systems, run XWS3002 (pressure side) and PF3001 (suction side).
Specifications for Fass STK1002
| Brand | FASS Fuel Systems |
| Part Number | STK1002 |
| Components | 5/8" PTFE suction tube; 6061-T6 billet aluminum bulkhead with 1/2" return port |
| Compatibility | Universal—Ford Powerstroke, GM Duramax, Dodge/Ram Cummins (trim-to-fit) |
| UPC | 850044106882 |
| GTIN | 0850044106882 |
| Shipping Method | Ground (standard; boxed accessory) |
| Prop 65 | Yes — Cancer and Reproductive Harm |
