MBRP 15.5-16 GM Duramax 6.6L 3in Down Pipe Kit
Replace that restrictive factory downpipe with a MBRP direct replacement downpipe for more flow, fuel economy, and better performance. Removal of OEM catalytic converters may be a violation of emissions laws in your jurisdiction. Ensure that the intended use of this product is permitted. Not for sale or use in the state of California.
Installation InstructionsInstallation Instructions
Warranty
- Direct Replacement. 20% Increased Flow Over Stock. Richer Diesel Sound.
- 20 Percent Greater Flow Over Stock
- Will Not Affect Emissions
- Gains Of +21 Horsepower
- 24 lb./ft./ Torque Gain
- Greater Heat Retention
- Richer Diesel Sound
This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2015-2017 | Chevrolet | Silverado 2500 HD | High Country |
| 2015-2017 | Chevrolet | Silverado 2500 HD | LT |
| 2015-2017 | Chevrolet | Silverado 2500 HD | LTZ |
| 2015-2017 | Chevrolet | Silverado 2500 HD | WT |
| 2015-2017 | Chevrolet | Silverado 3500 HD | High Country |
| 2015-2017 | Chevrolet | Silverado 3500 HD | LT |
| 2015-2017 | Chevrolet | Silverado 3500 HD | LTZ |
| 2015-2017 | Chevrolet | Silverado 3500 HD | WT |
| 2015-2017 | GMC | Sierra 2500 HD | Base |
| 2015-2017 | GMC | Sierra 2500 HD | Denali |
| 2015-2017 | GMC | Sierra 2500 HD | SLE |
| 2015-2017 | GMC | Sierra 2500 HD | SLT |
| 2015-2017 | GMC | Sierra 3500 HD | Base |
| 2015-2017 | GMC | Sierra 3500 HD | Denali |
| 2015-2017 | GMC | Sierra 3500 HD | SLE |
| 2015-2017 | GMC | Sierra 3500 HD | SLT |
Processing & Shipping Overview
Processing occurs before shipping.
Most in-stock items typically process within 2–3 business days before shipment or pickup. Expedited shipping options affect transit time after an order ships and do not speed up processing.
Made-to-order, special-order, vendor drop-ship, and freight items require additional processing time before shipping. Any extended lead times will be noted on the product page when applicable.
For the most up-to-date order status or lead time questions, please contact sales@smgspeed.com or use live chat during business hours.