Fleece #4 and #5 high pressure injection line (FPE-FL-LB7-45) for 2001-2004 Duramax LB7

$76.06

The Fleece #4 and #5 High Pressure Injection Line (FPE-FL-LB7-45) is a durable, high-quality replacement fuel line for 2001–2004 GM Duramax LB7 diesel engines. Designed to replace factory lines prone to cracking and leaks, it offers improved routing and materials for reliable fuel delivery under high pressure. Suitable for both stock and modified engines, it helps ensure long-term performance and reliability.

 

  • Replaces GM Part#97188722
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Description

The Fleece #4 and #5 High Pressure Injection Line (FPE-FL-LB7-45) is a precision-engineered fuel line designed specifically for the 2001-2004 GM Duramax LB7 diesel engines. This upgraded line replaces the factory #4 and #5 injector lines, which are known to be prone to cracking and fuel leaks over time due to age and high-pressure stress. Manufactured with high-quality materials and improved routing for enhanced durability, the Fleece injection line ensures reliable fuel delivery to the injectors under the extreme pressures common in diesel performance applications. Ideal for both stock and modified engines, the FPE-FL-LB7-45 is a critical component for maintaining optimal engine performance and long-term reliability in LB7-powered trucks.

Additional information
Weight 4.0 lbs
Dimensions 10.0 × 4.0 × 2.0 in
Fitment

Fitment

  • 2001 GM Silverado/Sierra 2500/3500 6.6L LB7 Duramax
  • 2002 GM Silverado/Sierra 2500/3500 6.6L LB7 Duramax
  • 2003 GM Silverado/Sierra 2500/3500 6.6L LB7 Duramax
  • 2004 GM Silverado/Sierra 2500/3500 6.6L LB7 Duramax
Installation

Installation

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About brand
Fleece Performance Engineering is a diesel performance manufacturer focused on reliability and precision engineering. The company designs parts that solve common diesel issues while supporting added power. Fleece products support daily driving, towing, and performance diesel trucks. Fleece engineers fuel system components, turbochargers, electronics, and emissions-compliant upgrades in house. Their parts improve efficiency, drivability, and long-term engine protection. Each product is tested for proper fit and consistent performance. Diesel owners trust Fleece for dependable upgrades. Whether maintaining a work truck or building for performance, Fleece delivers proven solutions designed for real-world use.
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