Dynomite Diesel LLY-50 50HP Injector Set | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY

Features:

• Fits 2004.5-2005 LLY Duramax engines
• Adds approximately 50 rear wheel horsepower
• Supports up to 625 RWHP with mods
• Remanufactured and flow matched set
• Flows 20 percent over stock injectors
• Safe for use on stock trucks
• Improves throttle response and power
• Drop-in installation with no tuning required
• Improves MPG and daily drivability
• Balanced set for smooth engine operation
• Pyrometer recommended for monitoring temps
• Not legal for sale in California

Power You Can Feel, Reliability You Can Trust

If you’re looking to wake up your 2004.5–2005 Duramax without diving headfirst into a full-blown build, the Dynomite Diesel LLY-50 50HP Injector Set is a solid place to start. These remanufactured injectors are designed specifically for the LLY engine and flow approximately 20 percent over stock, giving you a real-world gain of around 50 additional horsepower at the rear wheels. That boost isn’t just for dyno sheets—it translates to quicker throttle response, smoother acceleration, and better towing performance when you're out on the road. What’s great is that this set still plays nice with a completely stock setup, so you won’t need to upgrade your turbo or fuel system just to enjoy the gains. You get noticeable performance improvement without sacrificing street manners or fuel mileage.

Built for Daily Use, Ready for More

Each injector in the set is carefully balanced and flow-matched, ensuring your engine runs clean and smooth even under load. The kit drops right in as a direct replacement, so installation is straightforward with no special tuning required. These injectors are safe for daily drivers but also provide enough headroom to support up to 625 rear wheel horsepower with the right supporting mods down the line. That means you’re not just buying for today—you’re investing in future flexibility if you decide to build things up later. For best results, a pyrometer is recommended so you can keep an eye on exhaust temps, especially if you're towing or adding other upgrades. Just keep in mind, this set isn’t legal for sale in California, but for everyone else, it’s a no-compromise upgrade that balances power, drivability, and long-term durability.

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