Fleece FPE-34611 Injection Lines Complete Set of 8 | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7

Features:

• Fits 2001–2004 6.6L Duramax LB7 engines
• Includes complete set of 8 lines
• Brand new construction – no remanufactured parts
• No core charge required for purchase
• Replaces old corroded or cracked lines
• Prevents contamination during injector replacement
• Ideal to pair with new injectors
• Made for direct OEM-style fit and function
• Designed to eliminate common LB7 failure point
• Corrosion-resistant materials for long-term use
• Helps protect fuel system integrity
• Backed by trusted Fleece Performance quality

Replace What Fails Before It Leaves You Stranded

If you're swapping injectors on your LB7 or chasing down hard-start issues, now's the time to take care of those aging factory injection lines before they cause bigger problems. The Fleece FPE-34611 Injection Line Set gives your 2001–2004 Duramax a fresh start with a complete set of eight brand-new lines designed to restore fuel system reliability. Over the years, these lines are known to corrode, crack, or even break, leading to leaks and potential contamination that can ruin new injectors. Rather than risk damaging your engine or cutting corners with old parts, this kit gives you peace of mind with brand-new components and no core charge hassle. It’s a smart investment for long-term reliability, especially if you’re already tearing things down under the hood. Fleece designed these lines to match factory specs for a perfect fit, so install is straightforward without any guesswork. Whether you’re rebuilding for power, maintenance, or just making things right, these injection lines are the upgrade your LB7 deserves.

Engineered To Eliminate A Common LB7 Weak Spot

The Fleece FPE-34611 Injection Line Set is purpose-built for the 2001–2004 GM 6.6L Duramax LB7 platform, addressing one of the engine’s most notorious points of failure. Factory lines on these trucks often suffer from corrosion over time, and that can introduce rust or debris directly into your fuel system when replacing injectors. These new injection lines are manufactured to precise OE specifications and deliver consistent pressure without leaks or distortion. Made from corrosion-resistant materials, they provide long-term durability even in harsh underhood environments. Each line is pre-bent for factory routing, ensuring a secure fit and easy installation without unnecessary modifications. Because this is a complete set of eight, there's no need to hunt down individual pieces or worry about mismatched replacements. Designed as a direct-fit solution, this kit is ideal for injector jobs or preventive maintenance. Backed by Fleece’s trusted name in diesel performance, these lines are a solid fix to keep your LB7 running clean and strong.

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

Notes:

• Designed specifically for 2001–2004 GM 6.6L Duramax LB7 engines
• Includes a complete set of eight brand-new injection lines
• No core charge required – lines are 100% new
• Ideal replacement when installing new injectors
• Original LB7 lines are known to corrode and crack over time
• Damaged or dirty lines can contaminate new injectors
• Helps prevent common fuel system failures and leaks
• Recommended during any injector service on LB7 models
• Pre-bent to match factory routing for easy installation
• Manufactured to OE specifications for perfect fit and function