GM Duramax 6.6L - Silicone Intercooler Hose Kit (2004.5-2005)
Type: Intercooler Pipe
Keep the boost in and the power flowing—durable silicone hoses for your LLY Duramax.
Replace your brittle factory hoses with a performance-driven upgrade. The Silicone Intercooler Hose Kit for 2004.5–2005 LLY Duramax engines is engineered to handle heat, pressure, and long-term wear. Perfect for daily driving, towing, or tuned performance builds, these hoses deliver reliability when it matters most.
Vehicle Fitment
- ✅ 2004.5–2005 GMC Sierra 2500HD/3500HD 6.6L Duramax LLY
- ✅ 2004.5–2005 Chevrolet Silverado 2500HD/3500HD 6.6L Duramax LLY
Specifications
| Feature | Details |
|---|---|
| Product Type | Silicone Intercooler Hose Kit |
| Material | Multi-layer reinforced silicone |
| Oil Resistance | Yes – designed to withstand oil exposure |
| Clamps Included | Premium stainless T-bolt clamps |
| Installation | Direct fit, no cutting or modification required |
| Application | Daily driving, towing, or tuned performance |
What’s Included
- Multi-layer silicone intercooler hoses
- Premium stainless T-bolt clamps
- Direct-fit OEM replacement components
Key Features
- Multi-Layer Silicone Construction – Withstands high heat & boost pressures
- Oil-Resistant Design – Outlasts factory rubber hoses prone to breakdown
- Direct Fit Replacement – Installs with no cutting or modification
- Leak-Free Performance – Includes T-bolt clamps for secure sealing under boost
Benefits
- Prevents boost leaks and power loss
- Stronger, more durable than OEM rubber hoses
- Peace of mind for towing, hauling, or tuned applications
- Keeps your Duramax running reliably under pressure
Shipping
- Ships as a complete kit with hoses + clamps
- Packaged for safe delivery to prevent hose deformation
Important Notes:
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Your satisfaction is important to us. If you wish to return an item or request a refund, please review the terms and conditions outlined in our Returns Policy.
Important Notices
- Off‑Road Use Only
Products sold by JS Speed are intended for off‑road use and may be illegal on public roads where emissions or pollution‑control laws apply. - Check Local Laws
Before purchasing or installing, verify all applicable local, state/provincial, and federal regulations to ensure the modification is legal in your area. - Professional Installation Recommended
These parts should be installed by qualified professional mechanics. Improper installation can cause performance issues or vehicle damage. Unless a product page explicitly states otherwise, installation instructions are not included. Components are designed for users with solid mechanical knowledge, and minor adjustments or modifications may be required for proper fitment. Returns or refunds cannot be accepted due to difficulty completing an installation or the absence of instructions. - Warranty Impact
Use of these parts may void your vehicle’s factory warranty. Confirm with your vehicle manufacturer before purchase and installation. - Limitation of Liability
JS Speed is not responsible for damage, failures, or issues arising from the use or installation of these products. - Product Images
Images are for illustration only and may differ from the actual product due to manufacturer updates or improvements. - No Performance Guarantees
While these products are designed to enhance performance, JS Speed does not guarantee specific performance results.
