MBRP GMCA427 Armor Lite 3-Inch Turbocharger Downpipe for 2011-2014 Chevrolet Silverado 2500 HD 6.6L Duramax

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. Armor Lite Turbocharger Down Pipe; 3 in. Diameter; 4.5 in. Outlet Diameter Tip; Will Not Work With A 3" Bolt Flange Style Connection.

• Bolt-on Installation, Retains All Factory Mounting Points.
• Retains All Factory Mounting Points
• Direct Fit To Stock Exhaust

Upgrade the exhaust flow of your 6.6L Duramax-powered Chevrolet Silverado 2500 HD with the MBRP GMCA427 Armor Lite Turbocharger Downpipe. Designed as a direct replacement for the restrictive factory downpipe, this component supports improved exhaust flow, fuel economy, and overall engine performance. Its 3-inch diameter and 4.5-inch outlet tip provide a practical fit for stock-style exhaust systems while maintaining a clean, factory-compatible installation.

The MBRP GMCA427 is engineered for bolt-on installation and retains all factory mounting points, helping simplify installation without extensive modifications. It connects directly to the stock exhaust system for a straightforward replacement solution. This downpipe will not work with a 3-inch bolt-flange-style connection, so verify the vehicle’s existing connection before ordering.

Fitment: Designed for select 2011-2014 Chevrolet Silverado 2500 HD models equipped with the 6.6L Duramax engine. Confirm vehicle configuration and exhaust connection style before installation. This product is EPA compliant and carries CARB Executive Order D-763-2 where applicable; however, removal or replacement of OEM catalytic converters may be restricted by emissions laws in your jurisdiction. Not for sale or use in California. Review all applicable federal, state, and local regulations before purchase or installation. California Proposition 65 warnings may apply.

What's Included: One MBRP Armor Lite turbocharger downpipe. Installation hardware and instructions are included only if supplied by the manufacturer.

Features:

• Bolt-on installation: Retains factory mounting points for a straightforward replacement.
• Direct-fit design: Connects to the stock exhaust system without extensive modifications.
• Improved exhaust flow: Replaces the restrictive factory downpipe to support stronger performance and fuel economy.
• Durable Armor Lite construction: Built for dependable service in demanding automotive applications.

Fitments:
2011 Chevrolet Express 2500 Base
2011 Chevrolet Express 3500 Base
2011 Chevrolet Express 3500 LS
2011 Chevrolet Express 3500 LT
2011 Chevrolet Silverado 2500 HD LT
2011 Chevrolet Silverado 2500 HD LTZ
2011 Chevrolet Silverado 2500 HD WT
2011 Chevrolet Silverado 3500 HD LT
2011 Chevrolet Silverado 3500 HD LTZ
2011 Chevrolet Silverado 3500 HD WT
2011 GMC Savana 2500 Base
2011 GMC Savana 3500 Base
2011 GMC Sierra 2500 HD Denali
2011 GMC Sierra 2500 HD SLE
2011 GMC Sierra 2500 HD SLT
2011 GMC Sierra 2500 HD WT
2011 GMC Sierra 3500 HD Denali
2011 GMC Sierra 3500 HD SLE
2011 GMC Sierra 3500 HD SLT
2011 GMC Sierra 3500 HD WT
2012 Chevrolet Express 2500 Base
2012 Chevrolet Express 3500 Base
2012 Chevrolet Express 3500 LS
2012 Chevrolet Express 3500 LT
2012 Chevrolet Silverado 2500 HD LT
2012 Chevrolet Silverado 2500 HD LTZ
2012 Chevrolet Silverado 2500 HD WT
2012 Chevrolet Silverado 3500 HD LT
2012 Chevrolet Silverado 3500 HD LTZ
2012 Chevrolet Silverado 3500 HD WT
2012 GMC Savana 2500 Base
2012 GMC Savana 3500 Base
2012 GMC Sierra 2500 HD Denali
2012 GMC Sierra 2500 HD SLE
2012 GMC Sierra 2500 HD SLT
2012 GMC Sierra 2500 HD WT
2012 GMC Sierra 3500 HD Denali
2012 GMC Sierra 3500 HD SLE
2012 GMC Sierra 3500 HD SLT
2012 GMC Sierra 3500 HD WT
2013 Chevrolet Express 2500 Base
2013 Chevrolet Express 3500 Base
2013 Chevrolet Silverado 2500 HD LT
2013 Chevrolet Silverado 2500 HD LTZ
2013 Chevrolet Silverado 2500 HD WT
2013 Chevrolet Silverado 3500 HD LT
2013 Chevrolet Silverado 3500 HD LTZ
2013 Chevrolet Silverado 3500 HD WT
2013 GMC Savana 2500 Base
2013 GMC Savana 3500 Base
2013 GMC Sierra 2500 HD Denali
2013 GMC Sierra 2500 HD SLE
2013 GMC Sierra 2500 HD SLT
2013 GMC Sierra 2500 HD WT
2013 GMC Sierra 3500 HD Denali
2013 GMC Sierra 3500 HD SLE
2013 GMC Sierra 3500 HD SLT
2013 GMC Sierra 3500 HD WT
2014 Chevrolet Express 2500 Base
2014 Chevrolet Express 3500 Base
2014 Chevrolet Silverado 2500 HD LT
2014 Chevrolet Silverado 2500 HD LTZ
2014 Chevrolet Silverado 2500 HD WT
2014 Chevrolet Silverado 3500 HD LT
2014 Chevrolet Silverado 3500 HD LTZ
2014 Chevrolet Silverado 3500 HD WT
2014 GMC Savana 2500 Base
2014 GMC Savana 3500 Base
2014 GMC Sierra 2500 HD Denali
2014 GMC Sierra 2500 HD SLE
2014 GMC Sierra 2500 HD SLT
2014 GMC Sierra 2500 HD WT
2014 GMC Sierra 3500 HD Denali
2014 GMC Sierra 3500 HD SLE
2014 GMC Sierra 3500 HD SLT
2014 GMC Sierra 3500 HD WT
2015 Chevrolet Express 2500 Base
2015 Chevrolet Express 3500 Base
2015 Chevrolet Express 3500 LS
2015 Chevrolet Express 3500 LT
2015 Chevrolet Silverado 2500 HD High Country
2015 Chevrolet Silverado 2500 HD LT
2015 Chevrolet Silverado 2500 HD LTZ
2015 Chevrolet Silverado 2500 HD WT
2015 Chevrolet Silverado 3500 HD High Country
2015 Chevrolet Silverado 3500 HD LT
2015 Chevrolet Silverado 3500 HD LTZ
2015 Chevrolet Silverado 3500 HD WT
2015 GMC Savana 2500 Base
2015 GMC Savana 3500 Base
2015 GMC Savana 3500 LS
2015 GMC Savana 3500 LT
2015 GMC Sierra 2500 HD Base
2015 GMC Sierra 2500 HD Denali
2015 GMC Sierra 2500 HD SLE
2015 GMC Sierra 2500 HD SLT
2015 GMC Sierra 3500 HD Base
2015 GMC Sierra 3500 HD Denali
2015 GMC Sierra 3500 HD SLE
2015 GMC Sierra 3500 HD SLT

Air Freight Prohibited: false
Not Carb Approved: false
Carb Eo Number: D-763-2
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: Compliant
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 1