23 Products
Collection: 2011-2015 LML 6.6L Duramax Applicable Products
Ultimate Buying Guide for 2011-2015 LML 6.6L Duramax Performance Upgrades
Explore top performance parts for your 2011-2015 LML 6.6L Duramax. Upgrade your Duramax with SPELAB today!
1. Introduction to 2011-2015 LML Duramax Engine Upgrades
Understanding the LML 6.6L Duramax Engine
The 2011-2015 LML 6.6L Duramax engine is a standout in the heavy-duty diesel segment. Renowned for its reliability and performance, this engine is a favorite among truck owners. However, there are always opportunities to push its capabilities further. By understanding its core features and potential, you can select the right upgrades to enhance its performance and longevity.
Why Choose SPELAB for Your Duramax Upgrades?
SPELAB offers top-of-the-line performance parts specifically designed for the LML Duramax. Our products are engineered to meet the highest standards, ensuring they deliver the results you need. Choosing SPELAB means you’re opting for quality and expertise, backed by our commitment to exceptional customer support and technical guidance.
Ready to explore the best upgrades for your 2011-2015 LML Duramax? Let's move on to the essential modifications that can transform your engine’s performance.
2. Enhancing Duramax Cooling and Efficiency
Radiators for LML Duramax
Upgrading your radiator is crucial for maintaining the performance of your 2011-2015 LML Duramax, especially under heavy loads or extreme conditions. A high-quality radiator helps to prevent overheating, ensuring your engine runs efficiently even during the most demanding tasks. SPELAB radiators are designed with advanced cooling technology, offering superior heat dissipation and durability compared to stock radiators.
Intercoolers to Maximize Power
An upgraded intercooler plays a vital role in enhancing your engine’s efficiency by cooling the air entering the engine. Cooler air is denser, which improves combustion and results in more power output. SPELAB’s intercoolers are built to optimize airflow and reduce intake air temperatures, making them an ideal choice for those seeking to boost their Duramax engine’s performance.
With your engine's cooling and efficiency optimized, it's time to focus on protective upgrades that ensure your Duramax performs reliably for years to come.
3. Protective Upgrades for Long-Lasting Performance
Differential Covers
Upgrading your differential cover is a smart move for those looking to protect their 2011-2015 LML Duramax's drivetrain. A high-quality differential cover not only shields the differential from external damage but also improves oil cooling, which is essential for maintaining the health of your gears under heavy loads. SPELAB’s differential covers are engineered to offer superior protection and heat dissipation, extending the life of your differential.
Valve Covers for Enhanced Protection
Valve covers play a critical role in safeguarding your engine’s valvetrain. An upgraded valve cover from SPELAB provides better sealing, enhanced durability, and improved heat resistance. Whether you're looking for cast aluminum or billet aluminum options, SPELAB has the right solution to match your needs and enhance your engine bay's aesthetics.
With your Duramax now well-protected, let's complete your upgrade journey by exploring additional enhancements that can further optimize your engine's performance.
5. Additional Upgrades to Complete Your Duramax Setup
Custom Tuning Solutions
After installing performance upgrades, custom tuning is crucial to unlock the full potential of your 2011-2015 LML Duramax engine. Tuning adjusts the engine’s parameters to align with the new modifications, resulting in improved power, efficiency, and drivability. SPELAB offers expert tuning support to help you get the most out of your upgrades, ensuring your Duramax engine performs at its best.
You've now explored all the essential upgrades for your LML Duramax. Take the next step and bring your engine to its peak performance with SPELAB's high-quality products.
Conclusion
SPELAB offers everything you need to maximize your Duramax’s potential. Each product is designed with precision and backed by our commitment to quality, ensuring your truck performs at its best for years to come.
Ready to take your Duramax to the next level? Explore SPELAB’s full range of products and start upgrading today.
FAQs
Q1: What is the average lifespan of an LML Duramax engine?
A1: With proper maintenance, the LML Duramax can last over 300,000 miles, although this can vary based on usage and care.
Q2: Is it legal to delete the DPF on my 2011-2015 LML Duramax?
A2: DPF deletes are illegal in many regions due to emissions regulations. It’s important to check local laws before performing such modifications.
Q3: What fuel economy can I expect from a 2011-2015 LML Duramax?
A3: The LML Duramax typically achieves around 15-20 MPG, depending on driving conditions and load. Upgrades and tuning can sometimes improve fuel efficiency.
Q4: Can I use biodiesel in my LML Duramax?
A4: Yes, the LML Duramax is compatible with up to B20 biodiesel (20% biodiesel, 80% petroleum diesel), but using higher concentrations may require modifications and could void warranties.
Q5: What is the towing capacity of the 2011-2015 LML Duramax?
A5: The towing capacity ranges from 13,000 to 17,000 pounds, depending on the truck configuration. Performance upgrades can enhance towing power.
Q6: How do I improve the cooling on my LML Duramax?
A6: Upgrading the radiator, installing a more efficient intercooler, and ensuring proper airflow can significantly improve cooling, especially under heavy loads.
Filter products
- ENGINE
-
POWERSTROKE
- Tuner
- EGR Delete Kit
- CCV PCV Reroute Kit
- DPF Delete Exhaust
- DPF Delete Dual Exhaust
- All In One Kit
- Muffler
- Up-Pipe
- Downpipe
- Air Intake Kit
- Intercooler
- Intercooler Pipe Kit
- Radiator
- Oil Catch Can
- Differential Cover
- Transmission Pan
- Coolant Expansion Tank
- Exhaust Manifold
- Turbo
- CP4 Bypass Kit
- Fuel Tank Sump Kit
- Fuel Injector Tool Kit
- DURAMAX
- FOR CUMMINS
- ALL-IN-ONE KITS
- CATEGORIES
- BLOG&VIDEO
Let customers speak for us
from 2599 reviews
This 5” downpipe back kit fit absolutely perfect. Could not ask for a better fit and finish of this kit. All the hangers are in the correct location and the clamps supplied are of quality!

Installation was a breeze!

I bought this kit for my 2019 Ford F350, the same kit I bought for my 2014 F250 almost 5 years ago. The first kit I had significantly boosted my power to pull my 5th wheel up I-17.
While I haven’t pulled anything big yet with my F350 I can already feel the difference in power and performance.
VERY happy with my purchase and…no more DEF (garbage!).

Great replacement cover! Looks great and was easy to install and makes it much easier and cleaner to change my differential gear oil!

Easy and straightforward install and works perfectly

As advertised works and looks great

Good stuff, love the kit. Installed it all myself under 6 hours. Now I need to find a way to keep the minimax from getting unplugged when I hit a bump

Intake horn is real nice, block off plate is real nice, gaskets are decent. I removed first 3 fuel lines and the cp3 line and had mine done in about 4hr by myself start to finish. 2012 Cummins. No cel, no issues. Took away a lot of the black smoking. Increased boost noticeably. Five stars.

Good fit, sounds awesome, definitely made a difference, hose clamps could be a little better, holes was off a little for the sensors, but for the price overall good product!

They have great customer service what I order was much better than what I was expecting to receive thank you for guys for everything

This was a very easy install, the parts seems to be good quality.

Great products, the updates and revisions to there parts show they care about making things better. 100% would buy all my parts from Spelab.

Directions were not good and there isn’t a heater bolt yet..but the product is great and you can’t beat the price. Happy with the product.

This is a good upgrade. I change the rear differential fluid frequently so now I will be able to drain and refill more easily. Easy install. No leaking. Hardware and gasket included. Very happy

I was impressed with the build quality. And very happy with the cover features: fill plug, drain plug, sight glass, nice paint, cooling fins and machined channels on the inside to direct fluid flow. I also put in some AMSOIL diff fluid. A winning combo. Love that gasket and premium hardware is included. A much better deal than the Banks cover. This cover will cool plenty abd direct fluids where it needs to go. I’m happy with my investment and highly recommend.