FASS No-Drop Plus 165GPH Fuel System for 2015-2016 GM/Chevy Duramax 6.6L NDTSPC12165G

The FASS No-Drop Plus Series 165GPH Fuel System for 2015-2016 GMC/Chevrolet Duramax 6.6L is a premium mid-to-high capacity lift pump package designed for LML Duramax trucks that need more fuel supply headroom, stronger fuel conditioning, and a cleaner installation package than a basic lift pump system can provide. Item number NDTSPC12165G combines the TSPC12165G Titanium Signature Series Plus Fuel System with the SK5501 FASS Fuel Sump Kit, creating a matched No-Drop Plus package intended for approximately 600-1000 horsepower applications.

For 2015-2016 LML Duramax owners building beyond mild upgrades, the low-pressure side of the fuel system becomes increasingly important. Trucks with stronger tuning, additional airflow, injector upgrades, heavier towing under increased power, or more serious street-performance goals need more than a basic stock-style fuel supply strategy. A properly sized FASS system helps improve available fuel volume while also cleaning and stabilizing the fuel before it reaches the rest of the injection system.

What This FASS No-Drop Plus Kit Includes

This package includes the major components needed for a complete No-Drop Plus installation:

• One (1) TSPC12165G - Titanium Signature Series Plus Fuel System for 2015-2016 GM/Chevy Duramax 6.6L
• One (1) SK5501 - FASS Fuel Sump Kit

The No-Drop Plus format gives the installer a more complete fuel system solution right out of the box. Instead of sourcing a lift pump and sump kit separately, this package combines them into a matched system intended to simplify planning, reduce installation hassle, and help prevent the need to remove the fuel tank during installation.

Why 165GPH Is a Strong Match for 600-1000HP 2015-2016 LML Duramax Trucks

The 165GPH configuration fills a very useful gap between stock-oriented lift pump sizing and the much larger competition-oriented systems used on extreme builds. That makes it an excellent choice for 2015-2016 LML Duramax trucks that have clearly moved beyond mild upgrades but do not need the sheer overhead of the largest lift pump packages in the FASS catalog.

For trucks with stronger tuning, injector changes, turbo upgrades, higher sustained fueling demand, or more serious towing and street use, a 165GPH package can provide the additional fuel supply headroom needed to keep the low-pressure side of the fuel system from becoming a limiting factor. It gives the build room to grow while staying better aligned with real-world 600-1000 horsepower goals.

Fuel Quality and Injection Component Protection Benefits

The Titanium Signature Series Plus is designed to do more than simply move additional fuel. It is also built to condition the fuel before it reaches the rest of the system. According to the manufacturer information provided, this No-Drop Plus kit offers the following benefits:

• Increases fuel lubricity at least 10%
• Can 3x the life of injection components
• Removes over 99% of the water from fuel
• Eliminates entrained air and vapor
• Filters debris down to 2 microns absolute
• Provides far more fuel flow than OEM
• Electric Fuel Heater Kits available for cold environments
• Drastically simplifies installation

Those benefits matter because fuel quality directly affects injector life, pump life, drivability, and supply consistency. Water contamination, aeration, vapor, and fine particulate matter all work against long-term reliability. On a higher-output LML Duramax, improving the quality and stability of the low-pressure fuel supply is just as important as increasing the available fuel volume.

Why the No-Drop Plus Sump Package Matters

The included SK5501 FASS Fuel Sump Kit is a major part of this package's overall value. Fuel system installs often become more complicated when the pickup side of the job is handled separately or when the installer has to build the full solution from multiple pieces. By packaging the sump kit with the lift pump, FASS makes the installation more complete from the start and reduces the risk of piecing the system together incorrectly.

That is useful for both professional installers and experienced DIY owners. A more complete kit means cleaner planning, fewer parts to source, and a simpler route to completing the installation properly the first time.

Plus Series Hardware Upgrade Details

The Titanium Signature Series Plus takes the standard Titanium Signature platform and upgrades the hardware package for a more refined result. The use of ORB fittings helps provide a cleaner connection style, while the 6061 aluminum black anodized fittings and black fuel line give the final installation a more premium finished appearance. For many customers, that cleaner layout matters both visually and functionally.

That makes this kit appealing to buyers who want more than just fuel delivery. It also provides a cleaner, more finished install that fits better with a well-built engine bay and under-chassis setup.

LML Duramax Fitment and Related Fuel System Categories

This kit fits 2015-2016 Chevrolet Silverado and GMC Sierra 2500HD / 3500HD trucks equipped with the 6.6L Duramax LML. It is specifically targeted at later LML applications and sized for trucks in the 600-1000HP range.

For generation-specific fuel system parts and related Duramax categories, see:

• 11-16 LML Duramax Fuel System
• Duramax FASS Lift Pumps
• FASS Lift Pumps
• 01-04 LB7 Duramax Fuel System
• 04.5-05 LLY Duramax Fuel System
• 06-07 LBZ Duramax Fuel System
• 07.5-10 LMM Duramax Fuel System

Vehicle Fitment by Year

Troubleshooting and Installation Notes

Even a premium lift pump kit depends on correct installation. If the truck shows hard starts after installation, abnormal pump sound, erratic idle quality, pressure inconsistency, or fuel delivery issues under load, the first things to inspect are fitting tightness, sump sealing, priming procedure, filter condition, hose routing, and electrical supply quality.

• Check all fittings and hoses carefully after installation and after the first heat cycles
• Verify the sump is sealed correctly if seepage or pickup issues appear
• Prime the system fully before first start and after filter service
• Monitor filter service intervals because restricted filters can reduce flow and affect drivability
• Inspect power and ground quality if pump behavior becomes inconsistent
• Consider cold-weather heater options for trucks operating in severe winter climates

For trucks that see winter use, the availability of Electric Fuel Heater Kits is worth noting. Cold-weather diesel behavior can affect fuel handling and reliability, and heater support may be a smart addition in harsher climates.

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