GM Duramax 6.6L Down-pipe (2004.5-2010)
Type: Down-Pipe | Fits: GM Duramax
Upgrade your 2004.5–2010 Chevrolet Silverado or GMC Sierra 2500/3500HD 6.6L Duramax with this 3" stainless steel downpipe. Built for durability and performance, this downpipe improves exhaust flow by 20% over stock, lowers engine bay temperatures with included heat-wrap, and delivers the airflow your turbo needs for peak efficiency.
Vehicle Compatibility
- ✅ 2004.5, 2005, 2006, 2007, 2008, 2009, 2010 Chevrolet Silverado 2500/3500HD 6.6L Duramax
- ✅ 2004.5, 2005, 2006, 2007, 2008, 2009, 2010 GMC Sierra 2500/3500HD 6.6L Duramax
- ❌ Not compatible with Cab & Chassis trucks
Specifications
| Feature | Details |
|---|---|
| Material | 3" Stainless Steel Piping |
| Exhaust Flow | 20% increase vs. factory downpipe |
| Heat Management | Includes heat-wrap for reduced engine bay temps |
| Fitment | Direct turbo outlet fit for 2004.5–2010 Duramax pickups |
| Applications | Heavy-duty towing, daily driving, or competition use |
| Emissions | Designed not to interfere with emissions systems |
Key Features
- 3" Stainless Steel Construction – Corrosion-resistant and built for long-term reliability.
- 20% Better Flow – Improves turbo efficiency and overall exhaust performance.
- Heat-Wrap Included – Retains exhaust heat and lowers under-hood temperatures.
- Emissions-Friendly Design – Will not interfere with emissions equipment.
- Competition Ready – Ideal for high-performance or heavy-duty applications.
Performance Benefits
- Lower Exhaust Gas Temperatures (EGTs): Smoother exhaust flow reduces EGTs under load.
- Improved Turbo Efficiency: Faster spool and more responsive throttle.
- Enhanced Power & Reliability: Perfect for towing, hauling, or off-road competition.
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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.
