Injector #4 and #5 Line

Features

• Direct Replacement: High-pressure fuel lines specifically designed for cylinders #4 and #5.

• Enhanced Fuel Flow: Addresses potential restrictions in factory lines to optimize performance.

• Premium Construction: Built with corrosion-resistant materials for durability and reliability.

• OE-Style Fitment: Ensures a secure, leak-free installation with factory-style connections.

• Manufactured by Fleece Performance Engineering: A trusted name in diesel performance parts.

• Replaces GM Part #97378827

Optimized Fuel Delivery for Cylinders #4 and #5
The Fleece FPE-FL-LLY-45 Injector Line is engineered to replace the factory fuel lines for cylinders #4 and #5 on your 2004.5–2005 Duramax LLY. The original lines can develop flow restrictions over time, leading to decreased performance. Fleece's redesigned lines improve fuel delivery, ensuring consistent engine operation during towing, hauling, or daily driving.

Precision-Built for Duramax Reliability
Constructed to meet or exceed OEM specifications, these injector lines offer a precise fit and long-lasting performance. Whether you're performing routine maintenance or addressing fuel delivery issues, this set provides the quality and dependability expected from Fleece Performance.

Package Includes

• (1) Injector Line for Cylinder #4

• (1) Injector Line for Cylinder #5

Fitment
2004.5–2005 Chevrolet Silverado / GMC Sierra 2500HD & 3500HD 6.6L Duramax LLY

Warranty
Backed by Fleece Performance's limited warranty. For detailed coverage information, please contact us.

Fitment Notes

• Specifically designed for LLY engines (mid-2004 to early-2006 models).

• Not compatible with LB7, LBZ, or newer Duramax engines.

• Intended for use with factory-style injectors and fuel systems.