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Part #:

DDP LLYXXNZ High Flow Injector Nozzle Set

2004.5-2005 GM 6.6L Duramax LLY
Part #:
FROM 855
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DDP LLYXXNZ High Flow Injector Nozzle Set will make your 04.5-05 GM 6.6L Duramax Fly. With the Allison 5 and 6 speed, the Duramax is already fun to drive. Why not add an additional kick with DDP Injectors. Unlike an electronic box, honed performance injectors are almost impossible for a factory technician to detect. With DDPs Balance Honed injectors you can be confident that your warranty will not be compromised and youll have the extra pulling power to beat your friends up the mountain.

The 50 horsepower nozzles will give you 50hp at the wheels. You can use these in conjunction with an aftermarket electronic box or downloader without the worry of draining the fuel rail dry. We do not offer a 90hp version because we feel that 50 is the largest you can do without needing dual injection pumps. These injectors work equally well in a completely stock truck.


  • 1-Year Unlimited Mileage Warranty
  • 1-2 MPG Increase Common on 50HP Nozzles
  • Race Nozzles Also Available

Power Levels:

  • 50HP: Excellent Mileage & Great Performance
  • 75HP: Excellent Performance & Great Mileage
  • Competition: Price includes testing & balancing to your supplied bodies. Customer to send in injector bodies. No warranty. Sold upon completion of race waiver.
  • Super Mental: Custom spec for applications 725+ RWHP.  Do not recommend installing nozzles without first testing health of used injectors & then balancing injectors as a set with new nozzles installed.  Custom built to order upon completion of race waiver.  NO WARRANTY or RETURNS.

Product Options: 

DDP LLYCOMPNZ - Competition
DDP LLY-SMNZ - Custom Super Mental 

Note: Competition Injectors are sold without warranty and only built upon completion of race waiver. 


  • Manufacturer Name DDP (Dynomite Diesel)
  • Shipping Weight 5.00 lb.
  • Shipping Length 12 in.
  • Shipping Width 17 in.
  • Shipping Height 9 in.


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Emissions Notice

This product is not legal for sale or street use in California. Certain aftermarket products are subject to governmental emission standards regulated by the California Air Resources Board. In order for these products to be legal on a specific vehicle in California, the part number must receive a CARB Executive Order (EO) number. This number makes the part legal for use only on specific years, makes and models of vehicles. A decal with CARB EO number for these parts must be displayed in the engine bay to satisfy smog inspection requirements.