Fuel System
FASS Fuel Systems Fuel Sump Kit (SK5501) for Most Diesel Applications (cutting required)
The FASS Fuel Sump Kit SK5501 improves fuel delivery for most diesel trucks. It installs with a single hole, eliminates quarter tank issues, and includes suction and return ports for consistent fuel flow.
FASS No-Drop Series 100GPH Fuel System Stock-600HP (NDTSC10100G) For 2001–2010 Duramax 6.6L
Fleece 18″ Rail Pressure Sensor Extension Harness (FPE-HAR-RP-EXT) for 2001-2016 Duramax LB7 / LLY / LBZ / LMM / LML& 2003-2012 Cummins 5.9L / 6.7L
The Fleece 18″ Rail Pressure Sensor Extension Harness (FPE-HAR-RP-EXT) is a plug-and-play aftermarket solution for 2001–2016 Duramax and 2003–2012 Cummins engines. It provides an 18-inch extension for easier relocation of the rail pressure sensor during custom builds or fuel system upgrades. Built to OEM specs, it ensures a secure, reliable connection without the need for wire cutting or splicing.
Fleece #4 and #5 High Pressure Injection Line (FPE-FL-LLY-45) 2004.5-2005 Duramax LLY
The Fleece Performance High Pressure Injection Line (#4 and #5) is a durable, precision-engineered replacement part for the 2004.5–2005 GM Duramax LLY diesel engine. Designed to meet or exceed OEM standards, it ensures reliable fuel delivery and optimal engine performance for cylinders #4 and #5. Built to withstand high pressure and harsh conditions, it’s ideal for replacing worn or leaking factory lines, helping maintain fuel injection timing and engine efficiency.
Replaces GM Part # 97378827
Fleece #3 and #6 High Pressure Injection Line (FPE-FL-LLY-36) 2004.5-2005 Duramax LLY
The Fleece #3 and #6 High Pressure Injection Line is a durable, high-quality replacement for the factory fuel lines on 2004.5–2005 GM Duramax LLY diesel engines. Designed to address common issues like cracking and leaks from high pressure and heat, this upgraded line improves fuel system reliability and helps maintain engine performance. It’s a crucial upgrade for preventing potential injector or engine damage.
Replaces GM Part # 97378826
Fleece #2 and #7 High Pressure Injection Line (FPE-FL-LLY-27) 2004.5-2005 Duramax LLY
The Fleece #2 and #7 High Pressure Injection Line (FPE-FL-LLY-27) is a direct-fit replacement part for 2004.5–2005 Duramax LLY diesel engines. Made by Fleece Performance Engineering, it connects cylinders #2 and #7 to the fuel rail, ensuring accurate high-pressure fuel delivery. Built from durable materials to withstand extreme conditions, it meets or exceeds OEM standards, making it a reliable choice for restoring or enhancing engine performance and fuel system durability.
Replaces GM Part # 97378828
Fleece #1 and #8 High Pressure Injection Line (FPE-FL-LLY-18) 2004.5-2005 Duramax LLY
The Fleece Performance High Pressure Injection Line (FPE-FL-LLY-18) is a durable, OEM-quality replacement designed for the 2004.5–2005 GM Duramax LLY diesel engine. It addresses common issues with factory lines—such as cracking, leaks, and flow restrictions—by ensuring reliable fuel delivery to cylinders #1 and #8, helping maintain engine performance and efficiency. Ideal for restoring or upgrading the fuel system in LLY-powered trucks.
Replaces GM Part # 97378825
Fleece High Pressure Injection Line Kit (FPE-FL-DMAX-LLY-SET) for 2004.5-2005 Duramax LLY
The Fleece High Pressure Injection Line Kit (FPE-FL-DMAX-LLY-SET) is a high-quality replacement designed for 2004.5–2005 GM 6.6L Duramax LLY diesel engines. It includes OEM-style fuel lines that connect the fuel rails to the injectors, offering durability, leak prevention, and reliable performance under high pressure. Suitable for both stock and modified setups, this kit is an ideal upgrade or replacement for factory lines to maintain consistent engine performance.
Replaces GM Part# 97378825 (qty 2)
Replaces GM Part# 97378828 (qty 2)
Replaces GM Part# 97378826 (qty 2)
Replaces GM Part# 97378827 (qty 2)
