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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
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Let customers speak for us
from 2769 reviews
All parts arrived promptly and packed well. Installation was smooth and trouble free except for the tube style heater which would not thread into the new intake elbow. The provided plug threaded in fine so will have to revisit that issue before winter.

Overall I was very impressed. Pricing was great, everything I needed was provided. Quality of the parts was good. I would definitely recommend this package when compared to others.

Great products! Works perfectly!
Thank you so much!!

No written instructions came with the kit, no big deal. You will definately need the IAT extension wiring harness, which we wasnt told we needed. I ended up making my own extension but if you don't the truck will not start. Also the intake horn doesn't fit straight onto the inlet tube so if it looks crooked just make sure the clamp is tightened.

Packaging was good, install was simple, and it sounds great. What more could you ask for?

Kit went on fantastic, all hangers lined up. Freed up power and MPG. I installed the SPELAB muffler too, good combo, good sound. It drones under load and at about 70 but not unbearable. Super happy.

Have purchased a few different things , all worked at advertised! Will be making future purchases.

Great finish, not a terrible install, just time consuming. Just take your time it, we’ll worth it!

I took my F 150 to a local mechanic to get the differential cover and gasket removed, the fluid drained and then everything put back together. I didn't want to bother. My mistake. I got the truck back, put a piece of cardboard under the rear differential and determined that it was leaking slowly. I went back to the mechanic, they supposedly fixed it, but the cardboard check failed again. I went back to the mechanic and they told me it was the pinion seal bearing that was leaking. This problem never existed until I had taken the truck to them. I got the truck back in the pinion seal was no longer leaking but I still had a slow leak from the gasket around the differential cover. $400 later in three trips back to the mechanic I gave up, bought the SPELAB cast aluminum cover and the lube locker gasket plus the necessary fluid and did it myself. No leaks since then. I particularly like the little sight glass since I was able to get the fluid exactly to the halfway mark within the sight glass. I should never have gone to the local mechanic in the first place.

Very well made with quality materials and hardware! You will not be disappointed.

SPE ccv reroute is the best bang for your buck and works very well. Easy install and looks great when installed.

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!