Product Description
The DDP DDPLLY-50NZ is a 50-inch braided diesel fuel line built for custom fuel return or supply routing on 2001–2005 GM Duramax LB7 and LLY engines. Featuring non-zinc-coated ends for maximum compatibility with modern ultra-low sulfur diesel (ULSD) and biodiesel blends, this line is engineered for durability, flexibility, and long service life in high-performance fuel systems.
Vehicle Fitment:
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2001–2004 Chevrolet Silverado 2500HD / 3500HD – 6.6L Duramax LB7
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2004.5–2005 Chevrolet Silverado 2500HD / 3500HD – 6.6L Duramax LLY
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2001–2004 GMC Sierra 2500HD / 3500HD – 6.6L Duramax LB7
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2004.5–2005 GMC Sierra 2500HD / 3500HD – 6.6L Duramax LLY
Custom-use line; not a direct OEM replacement.
Specifications:
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Brand: DDP (Diesel Dealer Pros)
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Part Number: DDPLLY-50NZ
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Length: 50 inches
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Construction: Braided stainless steel
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Fitting Ends: AN-style, non-zinc coated
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Fuel Compatibility: Diesel, ULSD, Biodiesel (B20 and above)
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Pressure Rating: High-pressure diesel-capable
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Application: Supply or return line in custom fuel systems
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Made in: USA
Key Features:
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Non-zinc ends prevent corrosion from modern fuels
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Ideal for regulated return systems, CP3 swaps, or aftermarket filter kits
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Braided construction resists heat, abrasion, and high-pressure expansion
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Long-lasting, leak-free performance under extreme conditions
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Compatible with other DDP fuel system components
Suggested Pairings:
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DDPNLLY return blocks
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CP3 conversion kits
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DDPLLY-75NZ and 100NZ for multi-line setups
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Frame-rail or bed-mounted fuel system components
