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Flashark 3" Turbo Downpipe for 2011–2015 Chevy Silverado & GMC Sierra 2500HD/3500HD 6.6L LML Duramax
1 Item · Downpipe Exhaust + Intercooler · SKU: FLES08046-CS08012
$1,114.99
Product Specifications
3-Inch Turbo Downpipe for the 6.6L LML Duramax
Replace the restrictive factory turbo downpipe on your 2011–2015 Chevrolet Silverado or GMC Sierra HD with this Flashark 3-inch stainless-steel downpipe.
Located directly after the turbocharger, the factory downpipe contains a narrow, crushed section that can restrict exhaust flow. The larger 3-inch Flashark downpipe provides a smoother exhaust path while retaining the compatible downstream exhaust and emissions equipment.
The mandrel-bent stainless-steel construction, TIG-welded joints and included thermal wrap are designed to withstand the heat and vibration generated by the LML Duramax turbo-diesel engine.
Important: This is a turbo downpipe, not a DPF delete pipe. Installing this downpipe alone does not remove the truck’s DPF, DOC, DEF or SCR system.
Key Features
- Full 3-Inch Pipe: Provides a larger and smoother exhaust path than the restrictive factory turbo downpipe.
- V-Band Connection: Designed for 2011–2015 LML applications equipped with the compatible V-band exhaust connection.
- T-304 Stainless-Steel Construction: Offers resistance to exhaust heat and corrosion.
- Mandrel-Bent Tubing: Helps maintain the pipe’s internal diameter through the bends.
- TIG-Welded Joints: Reinforced connections provide strength and reliable exhaust sealing.
- Titanium Heat Wrap Included: Helps manage radiant heat around the rear of the engine and firewall area.
- Compatible with the Factory-Style Turbo: Designed around the original-style LML turbo outlet and V-band connection.
What to Expect
- Reduced restriction immediately after the turbocharger
- Smoother exhaust flow through the turbo downpipe
- Potentially quicker turbo response
- A slightly more noticeable turbo and exhaust sound
- Improved support for compatible intake, exhaust and tuning upgrades
Performance Notice: Actual results depend on the vehicle’s condition, turbocharger, downstream exhaust, ECU calibration and other modifications. A specific horsepower, torque or fuel-economy increase is not guaranteed.
Specifications
| Product Type | Turbo Downpipe |
| Engine Application | 6.6L LML Duramax Turbo Diesel |
| Pipe Diameter | 3 Inches |
| Material | T-304 Stainless Steel |
| Connection Type | V-Band |
| Construction | Mandrel-Bent and TIG-Welded |
| DPF Delete | No |
| Installation | Professional Installation Recommended |
Package Includes
- Downpipe
- Gasket(s)
- O2 sensor bung
- Mounting hardware
Important Installation Notes
- Confirm that the truck has the 6.6L LML Duramax engine.
- Confirm that the downpipe connection uses a V-band clamp before ordering.
- Some late-2015 trucks use the newer 3-bolt connection and are not compatible.
- Allow the engine and exhaust system to cool completely before installation.
- Professional installation is recommended because access behind the turbocharger is limited.
- Inspect and test-fit the product before wrapping, modifying or fully installing it.
Shipping, Returns & Warranty
- Shipping: Orders are normally dispatched within 1–2 business days. Delivery time depends on the destination and available warehouse.
- Returns: Covered by Flashark’s 30-day return policy when the product is new, uninstalled and in its original condition.
- Warranty: Includes a 12-month limited warranty against qualifying manufacturing defects.
Compliance Notice: This product is a replacement turbo downpipe and does not remove the factory DPF, DOC, DEF or SCR system. However, emissions and aftermarket-part regulations vary by location. Verify applicable requirements before purchasing or installing the product.
