High Pressure Injection Line (1 and 8)

Features:

• Direct replacement for cylinders 1 and 8
• Fits 2001–2004 Duramax LB7 engines
• Replaces GM part number 97188720
• Corrosion-resistant for long-lasting performance
• Upgraded design over factory fuel lines
• Helps prevent fuel system contamination
• Ideal for injector replacements or failures
• Built with 4140 machined injector swivel nuts
• Precision fit for reliable fuel delivery
• Durable construction resists cracking and wear
• Recommended during injector service or upgrades

Stop Future Leaks Before They Start

If you’re tearing into your LB7 to swap out injectors, don’t overlook the injection lines, especially cylinders 1 and 8. The stock lines are notorious for corrosion, cracking, and causing major issues down the road, even if they look fine at a glance. That’s where the Fleece FPE-FL-LB7-18 High Pressure Injection Line comes in. It’s a direct replacement built to eliminate the guesswork and restore reliable fuel delivery while you're already doing the job. This upgraded line features corrosion-resistant materials and machined 4140 injector swivel nuts that can handle the pressure and heat that these trucks dish out. You’ll protect your investment and reduce the risk of contamination or failure that can happen with aging OEM lines. It’s one of those smart upgrades that just makes sense while everything’s already apart. Save yourself the headache later and replace it with something built to last.

Built To Outlast The Factory Design

The Fleece Performance FPE-FL-LB7-18 High Pressure Injection Line is a high-quality replacement for GM part number 97188720, specifically designed for cylinder positions 1 and 8 on 2001–2004 GM Duramax LB7 engines. It addresses one of the most common failure points during injector service, corroded or weakened factory fuel lines. Constructed with 4140 machined injector swivel nuts, this line ensures a tight and durable seal while improving strength and longevity over the original design. The corrosion-resistant coating adds another layer of protection, making it suitable for long-term use in demanding engine environments. These precision-built lines help maintain proper fuel atomization and pressure, which is critical for injector performance and overall engine efficiency. Whether you're performing routine maintenance or repairing a failed component, replacing your old lines with this Fleece upgrade ensures a clean, safe, and leak-free installation. It's a practical solution engineered for reliability under real-world diesel conditions.

Fits: 2001, 2002, 2003, 2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7

Notes:

• Designed specifically for cylinder positions 1 and 8
• Fits 2001–2004 GM 6.6L Duramax LB7 engines
• Replaces factory GM part number 97188720
• Ideal replacement when changing injectors
• Factory LB7 lines are known to corrode and fail
• Failing lines can cause fuel contamination issues
• Machined 4140 swivel nuts improve durability and sealing
• Corrosion-resistant materials increase long-term reliability
• Recommended upgrade during injector service or failure repair
• Helps ensure leak-free and efficient fuel delivery