Dynomite Diesel NLLY-50 Brand New Injector Set 20% Over 50HP | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY

Features:

• Fits 2004.5–2005 LLY Duramax 6.6L
• Brand new 20 percent over injector set
• Adds approximately 50 rear wheel horsepower
• Supports up to 625 RWHP with mods
• Safe for use on stock trucks
• Improves power without sacrificing driveability
• Drop-in replacement requires no tuning
• Balanced and flow-matched injector set
• Recommended for street and performance builds
• Enhanced fuel delivery and throttle response
• Pyrometer use is strongly recommended
• Not legal for sale in California

Better Power Without Giving Up Street Manners

If you’re looking to wake up your 2004.5 to 2005 Duramax LLY without turning it into an all-out race truck, the Dynomite Diesel NLLY-50 Injector Set is a perfect middle ground. These are brand new injectors, not remans, and they flow 20 percent over stock. That translates to an estimated gain of 50 rear wheel horsepower, giving your Silverado or Sierra better throttle response and stronger mid-range power. What makes these injectors especially appealing is how well they behave in everyday driving. You’ll get smoother acceleration, improved torque for towing, and the kind of clean performance that makes your truck more fun to drive without any rough idle or smoke issues.

Built High-Performance Builds

Even though these injectors are drop-in ready for a stock truck, they also have the headroom to support up to 625 rear wheel horsepower with the right supporting mods. That makes them a smart long-term upgrade for anyone planning to build in stages. Installation is straightforward since no tuning or other vehicle upgrades are required right out of the box, though a pyrometer is recommended to keep an eye on exhaust temps. Each set is balanced and flow-matched to ensure consistency across all eight cylinders, helping protect your engine while delivering reliable performance gains. Whether you're hauling, daily driving, or laying the foundation for a future build, this set strikes the right balance between power and practicality.

Fits: 2004.5, 2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY