2015-2016 Duramax 6.6L FASS Titanium Signature Series 100GPH Fuel System

FASS Titanium Signature Series Fuel System (100GPH) 2015-2016 GM Duramax LML 6.6L

Part #: TSC12100G
Supersedes: TSC12100G

The 2011–2016 LML Duramax does not come equipped with a factory lift pump. That means the CP4 injection pump is forced to pull fuel under vacuum, which adds stress to the system and can introduce air into the fuel supply. A FASS system solves that by delivering clean, consistent fuel pressure while removing air and water before it ever reaches the injection system.

The FASS Titanium Signature Series 100GPH system is a complete replacement fuel supply and filtration upgrade designed for long-term reliability, smooth drivability, and better fuel system protection.

Rated at 100 GPH, this system is designed to support up to 600 HP, making it perfect for stock trucks and moderate performance builds, while still leaving room to grow.

Why Upgrade Your LML with a FASS

• Eliminates vacuum fuel draw and reduces stress on the CP4

• Removes air and vapor from fuel for consistent supply under load

• Filters fuel down to 2 microns and separates water to protect injectors

• Helps improve idle quality, throttle response, and cold starts

Features

• 100 Gallons Per Hour flow rating (supports up to 600HP)

• Preset 8–10 PSI fuel pressure

• 2 micron filtration rating

• Removes water, air/vapor, and debris from diesel fuel

• Helps extend injector and injection system life

• Improved cold-weather starts

• Can improve fuel mileage and overall drivability

• 1/2" fuel lines and ports for increased volume delivery

• Optional fuel pressure gauge port

• Optional electric heater kits available

• Limited lifetime warranty (with registration)

• Quiet operation (FASS Whisper Technology)

Technology Highlights

• FASS Whisper Technology (FWT): engineered to drastically reduce pump noise without sacrificing flow

• Performance Radius Cuts (PRC): improves internal fuel flow and helps prevent reintroducing air/vapor into fuel

• Mass Flow Return (MFR): constantly polishes fuel by returning excess fuel to the tank after filtration, keeping fuel clean and preventing cavitation

Installation Notes

• New bolt-on bracket system for easier mounting

• NOTE: Installation on cab & chassis trucks may require modifications