Collection: 2001-2004 6.6L LB7 Duramax Fuel System Upgrades
2001-2004 6.6L LB7 Duramax Fuel System Upgrades
Maximize the power and efficiency of your 2001-2004 6.6L LB7 Duramax with our premium fuel system upgrades. Designed to improve fuel delivery, optimize combustion, and increase horsepower, these components are essential for drivers looking to get the most out of their Duramax. Whether...
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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 Adapter Fitting -10AN Male to 1.325 Inch Bore FPE-34224-B
Regular price $35.65 USDSale price $35.65 USD Regular priceUnit price / per -
Fleece Performance M22x1.5 to -10AN Male/Male Aluminum FPE-34578-A
Regular price $13.99 USDSale price $13.99 USD Regular priceUnit price / per -
Fleece Performance 3/8 Inch CP3 Return Fitting FPE-CP3-RTRN
Regular price $15.95 USDSale price $15.95 USD Regular priceUnit price / per -
Fleece Performance 3/8 Inch Black Anodized Aluminum Y Barbed Fitting (For -6 Pushlock Hose) FPE-FIT-Y06-BLK
Regular price $23.99 USDSale price $23.99 USD Regular priceUnit price / per -
Fleece Performance LB7 High Pressure Injection Line (1 and 8) Fleece FPE-FL-LB7-18
Regular price $68.99 USDSale price $68.99 USD Regular priceUnit price / per -
Fleece Performance LB7 High Pressure Injection Line (2 and 7) For 01-04 Duramax LB7 Fleece FPE-FL-LB7-27
Regular price $68.99 USDSale price $68.99 USD Regular priceUnit price / per -
Fleece Performance LB7 High Pressure Injection Line (3 and 6) For 01-04 Duramax LB7 Fleece FPE-FL-LB7-36
Regular price $68.99 USDSale price $68.99 USD Regular priceUnit price / per -
Fleece Performance LB7 High Pressure Injection Line for 01-04 Duramax LB& (4 and 5) Fleece FPE-FL-LB7-45
Regular price $68.99 USDSale price $68.99 USD Regular priceUnit price / per -
Fleece Performance 2001-2016 GM Fuel Primer Bulb Sealing Kit 2001-2016 GM 2500/3500 FPE-GM-FFPD-0116
Regular price $49.99 USDSale price $49.99 USD Regular priceUnit price / per -
Fleece Performance LB7 Duramax Outer Injector Connector Pigtail FPE-HAR-DMAX-LB7-INJ-PT
Regular price $31.49 USDSale price $31.49 USD Regular priceUnit price / per -
Fleece Performance Fuel Pressure Regulator and Multiuse Pigtail FPE-HAR-FPR-PT
Regular price $27.99 USDSale price $27.99 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 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 -
FASS Adjustable Fuel Pressure Regulator
Regular price $152.17 USDSale price $152.17 USD Regular priceUnit price / per -
FASS High Output Heater Disk
Regular price $179.00 USDSale price $179.00 USD Regular priceUnit price / per -
Fleece Performance 9/16 Inch -18 Hex Socket Plug w/ O-Ring FPE-SP-91618
Regular price $4.49 USDSale price $4.49 USD Regular priceUnit price / per -
Fleece Performance 3/14 Inch-16 Hex Socket Plug w/ O-Ring FPE-SP-3416
Regular price $4.99 USDSale price $4.99 USD Regular priceUnit price / per -
Fleece Performance 7/8 Inch -14 Hex Socket Plug w/ O-Ring FPE-SP-7814
Regular price $5.99 USDSale price $5.99 USD Regular priceUnit price / per -
Fleece Performance 5/16 Inch Quick Connect to 3/4 Inch-16 O-ring (-8 AN) FPE-34552-A
Regular price $11.99 USDSale price $11.99 USD Regular priceUnit price / per -
Fleece Performance 5/8 Inch Hose Barb to 3/4 Inch-16 O-ring (-8 AN) FPE-34554-A
Regular price $12.99 USDSale price $12.99 USD Regular priceUnit price / per -
Fleece Performance 1/2 Inch CP3 Feed Fitting FPE-CP3-FEED
Regular price $15.95 USDSale price $15.95 USD Regular priceUnit price / per
2001-2004 6.6L LB7 Duramax Fuel System Upgrades
Maximize the power and efficiency of your 2001-2004 6.6L LB7 Duramax with our premium fuel system upgrades. Designed to improve fuel delivery, optimize combustion, and increase horsepower, these components are essential for drivers looking to get the most out of their Duramax. Whether you're towing, off-roading, or just looking for improved performance, our fuel system parts provide the enhanced functionality and reliability your truck needs.
High-Performance Fuel System Components for 6.6L LB7 Duramax
Our fuel system upgrades for the 2001-2004 6.6L LB7 Duramax include high-flow fuel injectors, fuel pumps, fuel filters, and more. These components work together to provide optimal fuel delivery, better fuel atomization, and improved engine performance. With enhanced fuel flow, your Duramax will experience improved throttle response, better fuel economy, and increased power, even under heavy load or extreme conditions.
Why Choose Our Fuel System Upgrades?
Upgrading your fuel system is one of the most effective ways to boost your Duramax's overall performance. Our parts are designed to handle increased horsepower, provide cleaner fuel delivery, and optimize combustion efficiency. Whether you’re looking to increase towing power, improve fuel efficiency, or boost overall engine performance, our high-quality fuel system components are built to meet the demands of your 2001-2004 6.6L LB7 Duramax.
Key Features:
- Increased Fuel Flow: High-flow injectors and pumps provide better fuel delivery for more power and performance.
- Enhanced Combustion Efficiency: Improved fuel atomization for better engine efficiency and performance.
- Reliable Components: Built to handle high power output, extreme conditions, and heavy-duty driving.




















