Heavy Duty Silicone Intercooler & Coolant Hose Kit 2011-2016 Chevy Silverado & GMC Sierra 6.6L Duramax

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Heavy Duty Silicone Intercooler & Coolant Hose Kit | 2011-2016 Chevy Silverado & GMC Sierra 6.6L Duramax

Complete your engine bay upgrade with the Mammoth Performance Heavy Duty Silicone Intercooler & Coolant Hose Kit—a full combo package engineered to replace the failure-prone factory rubber boots and hoses on your LML Duramax with multi-ply silicone built to last.

Two Critical Upgrades, One Complete Kit

The OEM intercooler boots and coolant hoses on your 2011-2016 6.6L Duramax weren't built for the long haul. Heat cycling, turbo boost pressure, and coolant chemical exposure cause the stock rubber to crack, swell, and blow off—leading to boost leaks, lost power, coolant leaks, and overheating. This combo kit replaces both systems at once with reinforced silicone, giving you stronger performance and lasting reliability in a single install.

Why Choose Mammoth Performance Silicone

  • Multi-Ply Silicone Construction – Reinforced with high-strength fabric layers to handle extreme heat, boost pressure, and vibration far better than OEM rubber
  • Maintains Boost Pressure – Intercooler boots eliminate leaks for stronger throttle response, better towing, and improved fuel efficiency
  • Superior Heat Resistance – Coolant hoses withstand the high under-hood and coolant temperatures of the hard-working Duramax diesel
  • Won't Crack, Swell, or Degrade – Silicone resists the breakdown that destroys factory rubber over time
  • Direct OEM Fit – Designed to match factory routing and connections for a precise install with no modifications
  • Available in Multiple Colors – Add a clean, custom finish to your engine bay

Fitment

This kit is specifically designed for:

  • 2011-2016 Chevrolet Silverado 2500/3500 6.6L Duramax
  • 2011-2016 GMC Sierra 2500/3500 6.6L Duramax
  • Fits the LML (2011-2016) engine

What's Included

  • Complete set of reinforced silicone intercooler boots
  • Complete set of reinforced silicone coolant hoses
  • Stainless steel clamps for secure, leak-free seals throughout

Upgrade With Confidence

Whether you're towing heavy, running a tune, or replacing tired factory components before they fail, this all-in-one Mammoth Performance Silicone Intercooler & Coolant Hose Kit delivers the complete, long-lasting upgrade your Duramax deserves.

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We have a 30-day return policy, which means you have 30 days after receiving your item to request a return.

To be eligible for a return, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase.

To start a return, you can contact us at support@mammothparts.com. If your return is accepted, we’ll send you a return shipping label, as well as instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted.

You can always contact us for any return question at support@mammothparts.com.


Damages and issues
Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right.


Exceptions / non-returnable items
Certain types of items cannot be returned, like perishable goods (such as food, flowers, or plants), custom products (such as special orders or personalized items), and personal care goods (such as beauty products). We also do not accept returns for hazardous materials, flammable liquids, or gases. Please get in touch if you have questions or concerns about your specific item.

Unfortunately, we cannot accept returns on sale items or gift cards.


Exchanges
The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item.


Refunds
We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method. Please remember it can take some time for your bank or credit card company to process and post the refund too.

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Heavy Duty Silicone Intercooler & Coolant Hose Kit 2011-2016 Chevy Silverado & GMC Sierra 6.6L Duramax
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