Finding reliable high pressure fuel lines for the LB7 Duramax 6.6L is essential for maintaining proper fuel delivery and engine performance. This guide highlights five compatible injector line sets designed to replace worn or damaged lines on 2001–2004 Chevrolet Silverado 2500HD/3500 and GMC Sierra 2500HD/3500 models. Each option focuses on durability, resistance to heat and vibration, and easy installation. Below, you’ll find quick product summaries and a buying guide to help you compare fitment, materials, and compatibility across the LB7 Duramax lineup.
| Product | Brand | Key Features |
|---|---|---|
| MuHize Fuel Injector Line Kit | MuHize | Direct replacement for 904-126/127/128/129; LB7 Duramax 2001–2004; high-temperature, high-pressure, corrosion-resistant |
| Kozlira 8Pcs Fuel Injector Feed Pipe Line Set | Kozlira | Replaces multiple part numbers; compatible with 6.6L LB7 Duramax; high-quality, corrosion and heat resistant |
| 97188720 Fuel Injector Lines Set (8PCs) | RJSPHH | Matches 904-126/127/128/129 and 97188723; durable construction for LB7 Duramax |
| Moseiny Stainless Steel 8PCS Fuel Injector Lines | moseiny | Direct replacement for listed 904/9718872x parts; complete set; designed for stable performance under load |
| WIKIBB LB7 Low Pressure Kit | WIKIBB | Low pressure lines kit for LB7; includes hoses and clamps for complete replacement |
MuHize Fuel Injector Line Kit — Direct Replacement
The MuHize kit is designed as a direct replacement for the 904-126, 904-127, 904-128, and 904-129 lines. It targets the LB7 Duramax diesel engines in Chevy Silverado 2500HD/3500 and GMC Sierra 2500HD/3500 from 2001 to 2004. The included lines are manufactured to exact dimensions for a proper fit without modification. Construction emphasizes resistance to high temperatures, pressures, and engine vibration, with a treated steel surface to resist corrosion over time.
Kozlira 8Pcs Fuel Injector Feed Pipe Line Set
This eight-piece injector line set replaces multiple part numbers including 97188720–23 and 904-series equivalents. It’s built for Silverado 2500HD/3500 and Sierra 2500HD/3500 with the LB7 Duramax 6.6L engine, 2001–2004. The kit emphasizes compatible fitment, corrosion resistance, and high-temperature tolerance, offering a robust option for those restoring fuel delivery integrity.
97188720 Fuel Injector Lines Set (8PCS)
RJSPHH’s 8-piece set covers 97188723, 97188720–22 and the 904-126–129 numbers, aligning with 2001–2004 LB7 Duramax Silverado 2500HD/3500 and Sierra 2500HD/3500. The construction focuses on reliable fuel flow and long-lasting performance, designed to meet the demands of heavy-duty diesel operation while maintaining compatibility with standard LB7 fuel rails and fixtures.
Moseiny Stainless Steel 8PCS Kit
The Moseiny set includes a complete eight-piece line kit compatible with 904-126 through 904-129 and 97188720/23, designed for 2001–2004 Sierra/Silverado with LB7 Duramax. It emphasizes direct replacement fit, engineered to match the original pathways, providing reliable fuel delivery and resistance to engine vibrations and heat for sustained performance.
WIKIBB LB7 Low Pressure Kit
WIKIBB offers a low pressure fuel line kit intended for LB7 Duramax 2500/3500HD trucks from 2001–2004. While focused on low pressure lines, the kit complements high-pressure injector lines by replacing the entire fuel delivery path, potentially improving leak resistance, overall fuel system integrity, and starting performance with a straightforward installation process.
Taesayl Low Pressure Fuel Hose Line Kit
The Taesayl kit focuses on low-pressure lines for 2001–2004 LB7 Duramax trucks, replacing part numbers 97230321, 97216066, 97216067, and others. It’s designed for compatibility with 6.6L diesel pickups and emphasizes durability of rubber hoses and clamps to manage pressure fluctuations in the fuel system during operation.
ASTROSYNC Low Pressure Fuel Hose Kit
ASTROSYNC’s kit is designed for LB7 2500/3500HD Duramax pickups (2001–2004). It replaces part numbers 97216063/64/65/66/67 and 97230321. The kit emphasizes high-quality materials and long service life, aiming to provide reliable fuel routing for consistent engine performance in diesel work conditions.
Buying Guide: Key Considerations for LB7 High Pressure Fuel Lines
- Compatibility: Confirm vehicle year, make, model, and engine code (LB7 6.6L Duramax, 2001–2004). Some sets target high pressure injector lines, while others address low pressure hoses; choose accordingly to your repair scope.
- Material and durability: Look for corrosion-resistant steel or high-temperature resistant alloys for injector lines, and robust rubber or silicone hoses for low pressure paths. Durability matters in extreme engine heat and vibration.
- Fitment and replacement scope: Direct-fit injector line replacements reduce the need for modifications. For complete replacement kits, ensure clamps and fittings are included to simplify installation.
- Brand and warranty: Reputable brands with clear compatibility notes and warranty coverage offer greater confidence for long-term reliability.
- Installation considerations: Some kits require specialized tools or careful routing to avoid interference with belts, moving parts, or heat shields. Review the included instructions and any online installation resources.
- Performance impact: High-quality injector lines support stable fuel pressure and injector performance, which can influence cold-start behavior, throttle response, and overall drivability in LB7 Duramax engines.
- Maintenance and replacement intervals: Even with quality parts, routine inspection of lines and connections helps prevent leaks and fuel system issues over time.
These options provide a range of replacements for LB7 Duramax trucks, prioritizing compatibility with the 2001–2004 Silverado 2500HD/3500 and GMC Sierra 2500HD/3500 platforms. When selecting, consider whether your goal is a direct injector line replacement or a broader fuel line upgrade, and verify that the kit includes all necessary connectors, clamps, and fittings for a complete repair.