2004.5-2025 6.6 Duramax EGR Delete Kit + Downpipe + Up-Pipe for L5P LML LMM LBZ LLY
When it comes to upgrading your diesel truck's performance, you need more than just individual components—you need a complete solution.
Spetuner EGR Delete Kit + Downpipe + Up-Pipe package is specifically designed for 2004.5-2025 Chevrolet Silverado and GMC Sierra 2500/3500HD 6.6L Duramax trucks. This comprehensive performance upgrade kit acts as a versatile 6.6 Duramax delete kit, enhancing power, improving fuel efficiency, and extending engine life.
With all the necessary parts included, there’s no need for extra purchases—making it ideal for DIY enthusiasts who want a hassle-free installation experience. Whether you drive an older model or need the latest 2025 Duramax delete kit, this package has you covered.
Fitment by Model Year
No matter what year your Duramax truck is, this kit is designed to fit perfectly:
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2017+ Chevrolet Silverado & GMC Sierra 2500/3500HD (L5P)
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2011-2016 Chevrolet Silverado & GMC Sierra 2500/3500HD (LML)
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2004.5-2010 Chevrolet Silverado & GMC Sierra 2500/3500HD (LMM, LBZ, LLY)
Please note: This kit is not compatible with Cab & Chassis trucks.
Package Includes
Each part in this package is engineered for optimal performance, ensuring your 6.6L Duramax diesel truck achieves exceptional power and reliability:
Eliminates exhaust gas recirculation, reduces engine deposits, and optimizes combustion efficiency.
Improves combustion chamber temperatures and extends the lifespan of your cooling system and engine.
Enables smoother exhaust flow, reducing backpressure and enhancing turbo responsiveness and fuel economy.
For tailored compatibility, we offer downpipe options—including specific 11-15 or 15.5-16 downpipe sizes for your LML Duramax delete—ensuring a perfect fit.
Enhances the overall exhaust flow, boosting power output and extending the durability of your exhaust system.
To maximize airflow and performance, we also provide high-flow intake elbow pipe tube options for your Duramax LMM, LBZ, and LLY models.
Specifications (Combo Overview)
| Item |
Specification |
| Brand |
Spetuner |
| Engine Platform |
6.6L Duramax (LLY / LBZ / LMM / LML / L5P) |
| Vehicle Fitment |
2004.5–2025 Silverado & Sierra 2500HD / 3500HD (non Cab & Chassis) - A true 6.6 Duramax delete kit for all years. |
| Downpipe |
Mandrel-bent 3.5" high-flow design. For 2004.5-2016 models, use 201 stainless steel, for 2017 to 2025 models, use 409 stainless steel
|
| Up-Pipe |
T304 stainless with flex bellows, TIG-welded flanges. |
| EGR Delete Construction |
High-temp-rated design, upgraded stainless steel and aircraft-grade aluminum alloy materials vs typical OEM layout |
| Typical Install Time |
Approx. 3–5 hours, depending on tools and experience |
| Recommended Use |
Off-road / competition / non-highway applications |
Performance Improvements & Product Benefits
When you install this kit, you’re not just upgrading one aspect of your diesel truck—you’re unlocking a complete performance transformation. This complete 6.6 Duramax delete kit is the ultimate upgrade.
- Free-Flowing Exhaust System
The combination of Downpipe and Uppipe drastically reduces exhaust backpressure, allowing your engine to work more efficiently. This improvement translates into higher horsepower output and better fuel economy. Imagine towing heavy loads or tackling off-road trails with faster throttle response and greater control. This applies whether you need an L5P delete or a solution for an older engine.
- Optimized Combustion Chamber Temperatures
By removing EGR gas recirculation, you can lower combustion chamber temperatures, preventing engine overheating. This protects your cooling system and ensures consistent performance, even under high demand.
Increased Power Output
With this kit, your Duramax truck gains significant power potential, supporting higher tuning levels. Whether it’s the 2025 Duramax delete kit or a solution for a previous generation, you’ll experience immediate improvements in horsepower and torque.
Extended Engine Longevity
Reducing exhaust gas recirculation lowers stress on the engine, preventing deposit buildup and significantly enhancing the longevity of your cooling and exhaust systems. Your truck won’t just perform better—it’ll stay at its peak for longer.
Why Choose SPETUNER?
As someone with experience in vehicle modifications, you know that choosing the right brand matters. At SPETUNER, we specialize in diesel truck performance upgrades, delivering top-tier solutions tailored for off-road and heavy-duty needs.
We pay attention to every detail of diesel truck modification, from installation ease to product compatibility, ensuring you can complete every upgrade with confidence. Choosing SPETUNER means choosing quality, performance, and exceptional customer service.
Dedicated GMC Duramax Installation Guides
If you need specific installation help for GMC models, please visit our dedicated blog section. We provide expert installation guides tailored for the GMC Duramax series, covering detailed steps and necessary components for various years and models, whether it's an lbz up pipe egr delete or an L5P delete.
Click here to view the GMC Duramax Installation Guides
On this page, you will find comprehensive articles and video tutorials for Duramax EGR delete, Downpipe, and Up-pipe installations for different versions of the GMC Duramax. These guides are designed to ensure a smooth and successful installation process.
Additional Recommended Upgrades
If you’re looking to push your truck’s performance even further, consider these add-ons:
TCM Tuning Upgrade
Optimize your transmission system for smoother shifts and more efficient power delivery.
3.5-Inch Downpipe
Designed to remove the DOC filter behind the turbocharger, further reducing exhaust backpressure and maximizing power output. A great addition to any 6.6 Duramax delete kit.
Exhaust Tips
Enhance the aesthetic and sound profile of your exhaust system, giving your truck a bold, custom look.
ALL-in-One Delete Bundle
Upgrade your GMC Diesel one time, with Spetuner all-in-one delete kit for GMC Duramax 2004.5-2025, includes EGR, DPF, DEF, CCV delete, and tuners. Boost HP, MPG & torque.
Take Action Now
It’s time to unleash your Duramax truck’s full potential!
Order the EGR Delete Kit + Downpipe + Up-Pipe package today and enjoy top-tier power and reliability.