34 Products
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. By understanding its core features and potential, you can select the right upgrades to enhance 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 results you need. Choosing SPELAB means opting for quality and expertise, backed by exceptional customer support and technical guidance.
2. Enhancing Duramax Cooling and Efficiency
Radiators for LML Duramax
Upgrading your radiator is crucial for maintaining performance under heavy loads or extreme conditions. SPELAB radiators offer superior heat dissipation and durability compared to stock radiators.
Intercoolers to Maximize Power
An upgraded intercooler enhances engine efficiency by cooling the air entering the engine. Cooler, denser air improves combustion, resulting in more power output.
3. Protective Upgrades for Long-Lasting Performance
Differential Covers
Upgrading your differential cover protects your drivetrain and improves oil cooling, extending gear life.
Valve Covers for Enhanced Protection
Upgraded valve covers provide better sealing, enhanced durability, and improved heat resistance while improving engine bay aesthetics.
5. Additional Upgrades to Complete Your Duramax Setup
Custom Tuning Solutions
Custom tuning adjusts engine parameters to match performance upgrades, improving power, efficiency, and drivability. SPELAB offers expert tuning support for your LML Duramax.
Conclusion
SPELAB offers everything needed to maximize your Duramax’s potential. Each product is precision-engineered, backed by quality, ensuring your truck performs at its best for years. Explore SPELAB’s full range and start upgrading today.
Select Your Vehicle
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41 reviews4.9 41 reviewsRegular price From $234.90Regular price$389.00Sale price From $234.90Fitment:
2011–2015 and 2015.5–2016 models are different. Please make sure to select the correct option. Does not fit Cab & Chassis trucks. -
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28 reviews4.89 28 reviewsRegular price From $1,349.00Regular price$1,440.67Sale price From $1,349.00Fitment:
2011-2015 Chevy /GMC Duramax Diesel LML, Silverado and Sierra pickup trucks -
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12 reviews4.92 12 reviewsRegular price From $999.00Regular price$1,399.99Sale price From $999.00 -
Let customers speak for us
from 5347 reviews
So far it looks nice and fit pretty well.
Welds look solid and professional quality, I have not installed them yet but I did put them in place under truck to ensure length and thus far everything looks good. I will give an update after install and on the road with them
Product came in earlier than expected and is made out of high quality materials. SPELAB hasn't let me down yet!!
The product installed perfectly high-quality superior part. For my 2022 f350. Coolant reroute kit.
Everything works great all parts fit hangers fit have pictures if needed
This is a really nice set up inexpensive but well-made. Make sure you use 1/4 inch drive and torque wrench, if you get the half socket 10mm and multi size extensions even better it’ll make getting those two back bolts easy
Makes truck breathe better and will definitely blow your y bridge out so do that while you’re in there looks great and fits up pretty good not perfect
Installed this SPELAB EGR Throttle Valve Delete on my 6.7 Cummins and the fitment was perfect. The kit was well made, installation was straightforward, and all the necessary parts were included. Everything lined up as it should and the truck runs great. Highly recommend for anyone looking for a quality replacement component.
I originally had the Banks Monster Ram intake with grid heater delete, and costed $1200. Recently I decided to give Spelab a try for their 3.5” pusher style intake with grid heater delete. Fraction of the price and performs the same. Only regret I have was my purchase of Banks.
Great product
Good product fast sipping was not that bad of a job
Nicely done ✅
Easy installation and everything fit perfectly. The kit is well-made, comes with the necessary components, and worked as expected. Shipping was fast and the quality exceeded my expectations. Highly recommend for anyone looking for a reliable EGR delete kit.
Very impressed with the quality of the cooler. Couldn’t find any instructions for the install. However, I was able to figure it out and plan to post a video for anyone else who may need help with the install.
Installed this on my 2015 6.7 Powerstroke and everything fit perfectly. Quality parts, straightforward install, and noticeable improvement in engine temps and reliability. Would definitely recommend this kit to anyone doing an EGR delete.
FAQs
With proper maintenance, the LML Duramax can last over 300,000 miles.
DPF deletes are illegal in many regions due to emissions regulations. Check local laws before modifications.
Typically 15-20 MPG depending on driving conditions and load. Upgrades may improve efficiency.
Yes, up to B20 (20% biodiesel), but higher concentrations may require modifications and could void warranties.
Ranges from 13,000 to 17,000 lbs depending on truck configuration. Performance upgrades can enhance towing power.
Upgrade the radiator, install a more efficient intercooler, and ensure proper airflow to improve cooling under heavy loads.
Yes. Removing EGR coolers and the DPF reduces backpressure significantly. Combined with a delete tune, drivers report 50–150 HP gains on the LML 6.6L depending on turbo efficiency and fuel system upgrades. The biggest gains come from eliminating the DPF restriction and tuning out the factory torque management limits built into the calibration.
An EGR delete removes only the Exhaust Gas Recirculation valve and cooler, eliminating intake coking and lowering EGTs. A full delete kit also removes the DPF (Diesel Particulate Filter) and sometimes the DEF system, maximizing exhaust flow. Start with EGR delete if you want cleaner combustion; go full delete for maximum power and eliminates all emissions-related maintenance.
