Collection: 2004.5-2005 6.6L LLY Duramax Fuel System Upgrades
2004.5-2005 6.6L LLY Duramax Fuel System Upgrades
Boost the performance and efficiency of your 2004.5-2005 6.6L LLY Duramax with our top-tier fuel system upgrades. Designed to improve fuel delivery, optimize combustion, and increase horsepower, these components are essential for drivers looking to push their Duramax to its full potential. Whether...
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FASS FASC09250G Adjustable Diesel Fuel Lift Pump 250GPH GM Duramax 6.6L 2001-2016
Regular price $699.00 USDSale price $699.00 USD Regular priceUnit price / per -
FASS FASC09290G Adjustable Diesel Fuel Lift Pump 290GPH GM Duramax 6.6L 2001-2016
Regular price $749.00 USDSale price $749.00 USD Regular priceUnit price / per -
Fleece Performance 3/8 Inch Billet Aluminum Universal Block Off Plug FPE-34070
Regular price $6.47 USDSale price $6.47 USD Regular priceUnit price / per -
Fleece Performance 1/2 Inch Billet Aluminum Universal Block Off Plug FPE-34071
Regular price $7.42 USDSale price $7.42 USD Regular priceUnit price / per -
Fleece Performance 7/8 Inch Billet Aluminum Universal Block Off Plug FPE-34113
Regular price $9.32 USDSale price $9.32 USD Regular priceUnit price / per -
Fleece Performance 5/8 Inch Billet Aluminum Universal Block Off Plug FPE-34139
Regular price $8.37 USDSale price $8.37 USD Regular priceUnit price / per -
Fleece Performance 10 Inch High Pressure Fuel Line 8mm x 3.5mm Line M14 x 1.5 Nuts FPE-34200-10
Regular price $48.00 USDSale price $48.00 USD Regular priceUnit price / per -
Fleece Performance 11 Inch High Pressure Fuel Line 8mm x 3.5mm Line M14 x 1.5 Nuts FPE-34200-11
Regular price $50.00 USDSale price $50.00 USD Regular priceUnit price / per -
Fleece Performance 12 Inch High Pressure Fuel Line 8mm x 3.5mm Line M14 x 1.5 Nuts FPE-34200-12
Regular price $52.00 USDSale price $52.00 USD Regular priceUnit price / per -
Fleece Performance 13 Inch High Pressure Fuel Line 8mm x 3.5mm Line M14 x 1.5 Nuts FPE-34200-13
Regular price $54.00 USDSale price $54.00 USD Regular priceUnit price / per -
Fleece Performance 14 Inch High Pressure Fuel Line 8mm x 3.5mm Line M14 x 1.5 Nuts FPE-34200-14
Regular price $56.00 USDSale price $56.00 USD Regular priceUnit price / per -
Fleece Performance 21 Inch High Pressure Fuel Line 8mm x 3.5mm Line M14 x 1.5 Nuts FPE-34200-21
Regular price $70.00 USDSale price $70.00 USD Regular priceUnit price / per -
Fleece Performance 22 Inch High Pressure Fuel Line 8mm x 3.5mm Line M14 x 1.5 Nuts FPE-34200-22
Regular price $72.00 USDSale price $72.00 USD Regular priceUnit price / per -
Fleece Performance 23 Inch High Pressure Fuel Line 8mm x 3.5mm Line M14 x 1.5 Nuts FPE-34200-23
Regular price $74.00 USDSale price $74.00 USD Regular priceUnit price / per -
Fleece Performance 7 Inch High Pressure Fuel Line 8mm x 3.5mm Line M14 x 1.5 Nuts FPE-34200-7
Regular price $44.10 USDSale price $44.10 USD Regular priceUnit price / per -
Fleece Performance 8 Inch High Pressure Fuel Line 8mm x 3.5mm Line M14 x 1.5 Nuts FPE-34200-8
Regular price $46.20 USDSale price $46.20 USD Regular priceUnit price / per -
Fleece Performance 9 Inch High Pressure Fuel Line 8mm x 3.5mm Line M14 x 1.5 Nuts FPE-34200-9
Regular price $48.30 USDSale price $48.30 USD Regular priceUnit price / per -
Fleece Performance LLY Duramax High Pressure Injection Line (Number 1 and Number 8) FPE-FL-LLY-18
Regular price $69.99 USDSale price $69.99 USD Regular priceUnit price / per -
Fleece Performance LLY Duramax High Pressure Injection Line (Number 2 and Number 7) FPE-FL-LLY-27
Regular price $69.99 USDSale price $69.99 USD Regular priceUnit price / per -
Fleece Performance LLY Duramax High Pressure Injection Line (Number 3 and Number 6) FPE-FL-LLY-36
Regular price $69.99 USDSale price $69.99 USD Regular priceUnit price / per -
Fleece Performance LLY Duramax High Pressure Injection Line (Number 4 and Number 5) FPE-FL-LLY-45
Regular price $69.99 USDSale price $69.99 USD Regular priceUnit price / per -
Fleece Performance 18 Inch Rail Pressure Sensor Extension Harness FPE-HAR-RP-EXT
Regular price $43.04 USDSale price $43.04 USD Regular priceUnit price / per -
Fleece Performance Rail Pressure Sensor 6 Inch Pigtail FPE-HAR-RP-PT
Regular price $25.99 USDSale price $25.99 USD Regular priceUnit price / per -
Fleece Performance 1/2 Inch NPT Hex Socket Plug Black FPE-NPT-12
Regular price $4.49 USDSale price $4.49 USD Regular priceUnit price / per -
Fleece Performance 1/4 Inch NPT Hex Socket Plug Black FPE-NPT-14
Regular price $2.99 USDSale price $2.99 USD Regular priceUnit price / per -
Fleece Performance 1/8 Inch NPT Hex Socket Plug Black FPE-NPT-18
Regular price $2.99 USDSale price $2.99 USD Regular priceUnit price / per -
Fleece Performance 3/4 Inch NPT Hex Socket Plug Black FPE-NPT-34
Regular price $4.99 USDSale price $4.99 USD Regular priceUnit price / per -
Fleece Performance 3/8 Inch NPT Hex Socket Plug Black FPE-NPT-38
Regular price $2.99 USDSale price $2.99 USD Regular priceUnit price / per
2004.5-2005 6.6L LLY Duramax Fuel System Upgrades
Boost the performance and efficiency of your 2004.5-2005 6.6L LLY Duramax with our top-tier fuel system upgrades. Designed to improve fuel delivery, optimize combustion, and increase horsepower, these components are essential for drivers looking to push their Duramax to its full potential. Whether you're aiming for better towing performance, more power for off-roading, or improved fuel economy, our fuel system upgrades provide the performance and reliability you need.
High-Performance Fuel System Upgrades for 6.6L LLY Duramax
Our fuel system components for the 2004.5-2005 6.6L LLY Duramax are engineered to maximize fuel flow and improve overall engine efficiency. These upgrades include high-flow fuel injectors, fuel pumps, filters, and other critical components designed to deliver more consistent fuel delivery and better fuel atomization. With these parts, you’ll experience smoother acceleration, improved power output, and optimized fuel efficiency.
Why Choose Our Fuel System Upgrades?
Upgrading your fuel system ensures that your engine receives the proper fuel flow to maximize performance. Whether you’re increasing horsepower for heavy towing, seeking a more responsive throttle, or just looking to improve your truck’s efficiency, these upgrades provide the solution. Our high-performance fuel components will improve combustion efficiency and ensure that your engine is getting the clean, high-quality fuel it needs.
Key Features:
- Increased Fuel Flow: High-flow injectors and pumps provide the fuel your engine needs for optimal performance.
- Enhanced Efficiency: Improved fuel delivery and atomization lead to better combustion, fuel economy, and engine response.
- Reliability: Built to withstand extreme conditions and improve the lifespan of your Duramax fuel system.


























