Description
Overview
The FASS TSC12165G Titanium Signature Series Diesel Fuel System is a dedicated aftermarket lift pump and filtration package engineered specifically for the 2015-2016 GM Duramax LML 6.6L. Unlike some other diesels, the Duramax doesn’t come with a factory lift system, which forces the CP4 injection system to draw fuel under a vacuum. That added strain can shorten the life of the CP4 and pull unwanted air into the fuel supply. The Titanium Signature Series steps in to feed your engine clean, consistent, air-free fuel and take that load off the injection system.
Machined from 6061 T-6 billet aluminum and finished in black, this system was engineered by FASS Fuel Systems to be a top-performing, long-lasting, and reliable filtration solution built for the demands of a hard-working diesel. Rated at 165 gallons per hour and operating at 8-10 PSI, it delivers the fuel volume needed to support serious performance goals.
Performance & Filtration Benefits
Designed for moderate to extreme builds in the 600-900 HP range, the 165GPH capacity provides enough fuel headroom to support multiple fueling system upgrades as your build evolves. Beyond raw volume, the Titanium Signature Series brings advanced filtration that helps protect your Duramax’s injection system and injectors by separating air and contaminants from the fuel before it ever reaches the pump. Cleaner fuel means less stress on your CP4 and a longer service life for the components that matter most.
- 165 GPH capacity to support 600-900 HP moderate-to-extreme builds
- Operates at a steady 8-10 PSI for consistent fuel delivery
- Constructed from durable 6061 T-6 billet aluminum in a black finish
- Advanced filtration removes air and contaminants to protect the CP4 injection system and injectors
- Titanium Signature Series engineering focused on performance, longevity, and reliability
- Backed by a FASS limited lifetime warranty
Why It Matters for the LML Duramax
Because the LML relies on the CP4 to pull fuel, adding a dedicated FASS system fundamentally changes how fuel reaches your engine. Instead of the injection pump straining under vacuum, the Titanium Signature Series pushes clean, pressurized, air-free fuel forward. That translates into reduced stress on the injection system and better protection for expensive injectors, whether you run a stock truck or a heavily modified build.
Fitment
This system is built for the 2015-2016 GM Duramax LML 6.6L, covering both Truck and SUV applications. It is sold as a complete kit under part number TSC12165G, so you get the components needed to add dedicated fuel delivery and filtration to your Duramax. Choose the Titanium Signature Series when you want a proven upgrade path that keeps clean fuel flowing and gives your injection system the support it was missing from the factory.
