Product Description
Why upgrade: The FASS FASC09165G Adjustable Diesel Fuel Lift Pump delivers a steady 165 GPH with adjustable fuel pressure (approx. 1–20 PSI) to support tuned Duramax builds while dramatically improving filtration and air/vapor separation for cleaner, quieter fuel delivery and better injector life.
Fits
- 2001–2016 GM 6.6L Duramax (LB7, LLY, LBZ, LMM, LML) – Silverado/Sierra 2500/3500
Key features
- Adjustable fuel pressure for stock to high-performance setups
- High-flow 165 GPH supply with advanced air/vapor separation
- Quiet operation and consistent pressure under load
- Engineered to work with factory filtration; pair with FASS filters for best results
Recommended FASS cross-references (on CPP Diesel)
- FASS XWS-3002-XL Extreme Water Separator (extended length): XWS-3002-XL
- FASS PF3001XL Particulate Filter (extended length): PF3001XL
- FASS FLP3000XL Fleet Filter Pack (XL): FLP3000XL
- FASS STK1002 5/8" Suction Tube Kit with Bulkhead: STK1002
- Looking for a full system alternative? See FASS TSPC10165G Titanium Signature Series Plus (2001–2010 Duramax, 165 GPH): TSPC10165G
Helpful notes
- Use the extended-length PF3001XL (suction side) with the XWS-3002-XL (pressure side) on updated systems.
- Plumbing and tank pickup needs vary by model/usage; many builds benefit from the STK1002 draw straw.
Installation
Download the manufacturer installation guides here: Signature Series Adjustable Fuel Pump Manuals.
FAQ
How much horsepower will this pump support?
The 165 GPH adjustable lift pump is commonly used on tuned Duramax builds in the ~600–900 HP range when matched with proper fuel system upgrades and tuning. Always verify total system demand.
Do I still need my factory fuel filter?
Yes—this is a lift pump/fuel system component. Retain the OE filter unless your build uses a dedicated FASS filtration base and filters as part of a full system.
Which filters should I run with this pump?
Use the PF3001XL (suction) and XWS-3002-XL (pressure). The XL filters are the current, extended-length format.
Is a draw straw required?
Not always, but a draw straw can reduce restriction on higher-demand setups. See FASS STK1002.
Specifications for Fass FASC09165G
| Attribute | Value |
|---|---|
| Brand | FASS Fuel Systems |
| Part Number | FASC09165G |
| Flow Rate | 165 GPH |
| Adjustable Pressure | Approx. 1–20 PSI (application dependent) |
| Engine Compatibility | 2001–2016 GM 6.6L Duramax (LB7/LLY/LBZ/LMM/LML) |
| UPC | 850044106967 |
| GTIN | 00850044106967 |
| Shipping Method | Ground (small parcel); shipping calculated at checkout |
| Country of Origin | Not specified |
| Prop 65 | WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov |
