Engineered specifically for high-horsepower race and competition 2001 through 2016 Chevrolet Silverado and GMC Sierra 2500HD/3500 trucks powered by the 6.6L Duramax V8 turbo diesel engine (LB7, LLY, LBZ, LMM, and LML platforms), the FASS Signature Series Adjustable 250 GPH Fuel Lift Pump (Part # FASC09250G) supplies the extreme volume required to prevent fuel starvation on multi-pump or stroker injection builds.

Rated at 250 gallons per hour, this adjustable lift pump system includes a precision-machined 6061 T-6 billet aluminum bulkhead fitting and PTFE Teflon suction tube kit that eliminates filler neck cutting during installation. Equipped with a built-in boost compensation port to scale pressure dynamically under wide-open throttle, this high-performance system carries zero core charge.

Key Features & Benefits

• Extreme 250 GPH Flow Rate: Built specifically for high-output competition engines supporting 900 to 1,200 horsepower.
• Adjustable Fuel Pressure Control: Features an external regulator adjustable from 1 to 75 PSI to meet rigorous race-tuning demands.
• Included Bulkhead & Suction Tube Kit: Comes complete with a 5/8" PTFE Teflon suction tube and 1/2" return bulkhead fitting for simplified tank plumbing.
• Boost Compensation Port: Automatically references intake manifold pressure to raise fuel supply under heavy load, preventing rail pressure drop.
• Zero Core Charge: Brand-new outright competition lift pump system requiring no core deposit or core return shipping.

Technical Specifications

• Manufacturer / Brand: FASS Fuel Systems (Fuel Air Separation Systems)
• Manufacturer Part Number / SKU: FASC09250G
• Product Type: Adjustable High-Performance Diesel Fuel Lift Pump & Suction Kit
• Flow Rate Capacity: 250 GPH (Gallons Per Hour)
• Horsepower Rating: Recommended for extreme competition builds (900–1,200 HP)
• Truck Compatibility: 2001–2016 GM 2500HD / 3500 Silverado & Sierra
• Engine Platform: 6.6L Duramax V8 Turbo Diesel (LB7, LLY, LBZ, LMM, LML)
• Core Requirement: None
• Warranty: FASS Limited Lifetime / Extended Warranty Program

Vehicle Fitment & Technical Installation Notes

• 2001–2004 GM 2500HD / 3500 Duramax 6.6L (LB7)
• 2004.5–2005 GM 2500HD / 3500 Duramax 6.6L (LLY)
• 2006–2007 GM 2500HD / 3500 Duramax 6.6L (LBZ Classic)
• 2007.5–2010 GM 2500HD / 3500 Duramax 6.6L (LMM)
• 2011–2016 GM 2500HD / 3500 Duramax 6.6L (LML)
• Installation Tip: Install the included fuel tank bulkhead and 5/8" suction tube carefully to maintain uninterrupted fuel supply down to 1/8 tank levels. Connect the boost reference line to intake manifold pressure for accurate load tracking.