GM Duramax 6.6L - Silicone Intercooler Hose Kit (2004.5-2005)
Type: Intercooler Pipe
Hold the boost. Protect the power. Upgrade your 2004.5–2005 LLY Duramax with a reinforced silicone intercooler hose kit built to handle heat, boost pressure, and long-term engine demands. Whether your truck is stock, tuned, towing heavy loads, or daily driven, this kit replaces weak factory rubber hoses with a stronger, more reliable solution.
Factory intercooler hoses on LLY Duramax engines are known to degrade over time—especially when exposed to heat, oil mist, and increased boost levels. This multi-layer silicone hose kit is designed as a direct-fit replacement to improve durability and reduce the risk of boost leaks. Built for performance and reliability, it helps maintain consistent airflow under demanding conditions.
Vehicle Fitment
- 2004.5–2005 GMC Sierra 2500HD / 3500HD – 6.6L Duramax LLY
- 2004.5–2005 Chevrolet Silverado 2500HD / 3500HD – 6.6L Duramax LLY
Technical Specifications
| Product Type | Silicone Intercooler Hose Kit |
| Material | Multi-Layer Reinforced Silicone |
| Oil Resistance | Designed to withstand oil exposure |
| Clamps Included | Premium Stainless T-Bolt Clamps |
| Installation | Direct-Fit Replacement (No Cutting Required) |
| Application | Daily Driving, Towing, Performance Builds |
What’s Included
- Multi-layer reinforced silicone intercooler hoses
- Premium stainless steel T-bolt clamps
- Direct-fit OEM-style replacement components
Features
- Reinforced multi-ply silicone construction for high-boost durability
- Oil-resistant material designed to outlast factory rubber hoses
- Precision-molded direct-fit design
- Heavy-duty T-bolt clamps for secure, leak-resistant connections
Benefits
- Helps eliminate boost leaks and inconsistent power delivery
- More durable than OEM rubber intercooler hoses
- Improved reliability under towing and high-load conditions
- Supports tuned and performance-oriented applications
- Added confidence in demanding driving environments
Shipping Information
- Ships as a complete hose and clamp kit
- Packaged to protect hose shape and prevent deformation during transit
Important Notes:
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Return Policies
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.
