Fleece #1 and #8 High Pressure Injection Line (FPE-FL-LLY-18) 2004.5-2005 Duramax LLY

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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

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SKU: FPE-FL-LLY-18 Categories: , , ,
Description

The Fleece Performance High Pressure Injection Line (#1 and #8), (FPE-FL-LLY-18), is designed specifically for the 2004.5–2005 GM Duramax LLY diesel engine. This high-quality replacement line addresses common issues with the factory-installed lines, such as cracking, leaking, or restricted flow due to age or contamination. Engineered for durability and performance, the Fleece high pressure injection line ensures proper fuel delivery to cylinders #1 and #8, which are critical for maintaining optimal engine performance and efficiency. Built to meet or exceed OEM specifications, this component is a reliable upgrade for Duramax owners seeking to restore or improve fuel system integrity in their LLY-powered trucks.

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

Fitment

  • 2004.5 GM Silverado/Sierra 2500/3500 6.6L LLY Duramax
  • 2005 GM Silverado/Sierra 2500/3500 6.6L LLY 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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