MBRP GMCA428 Armor Lite 3-Inch Turbocharger Downpipe for 2015-2016 Chevy/GMC 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; 3 Bolt Flange; 4.5 in. Outlet Diameter Tip; Only Works With A 3 Bolt Flange Style Connection.

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

Upgrade the exhaust flow of your 2015-2016 Chevrolet Silverado or GMC Sierra 2500 HD or 3500 HD with the MBRP GMCA428 Armor Lite Turbocharger Downpipe. Designed as a direct replacement for the restrictive factory downpipe, this 3-inch downpipe supports improved exhaust flow, fuel economy, and engine performance. It is engineered for vehicles using a 3-bolt flange-style connection and connects directly to the stock exhaust system.

The MBRP GMCA428 features a bolt-on installation that retains factory mounting points, helping simplify installation without requiring extensive modifications. Its 4.5-inch outlet tip provides a finished appearance while supporting efficient exhaust routing. This automotive replacement component is designed for fitment on select 2015 Chevrolet Silverado 2500 HD, Silverado 3500 HD, GMC Sierra 2500 HD, and GMC Sierra 3500 HD models equipped with the 6.6L Duramax engine. Verify the original connection style before ordering.

• Flow Improvement: Replaces the restrictive factory downpipe to support improved exhaust flow and performance.
• Direct-Fit Design: Connects to the stock exhaust system and retains factory mounting points.
• Bolt-On Installation: Designed for straightforward installation with a 3-bolt flange-style connection.
• Duramax Application: Engineered for select 2015-2016 Chevrolet and GMC 6.6L Duramax trucks.

Product Specifications and Technical Data

• Brand: MBRP
• Part Number: GMCA428
• Product Type: Turbocharger downpipe
• Material Series: Armor Lite
• Pipe Diameter: 3 inches
• Outlet Tip Diameter: 4.5 inches
• Flange Style: 3-bolt connection
• Exhaust Compatibility: Direct fit to stock exhaust

What's Included

One MBRP Armor Lite turbocharger downpipe. Installation hardware is included only when supplied by the manufacturer.

Important: Removal of original equipment catalytic converters may violate emissions laws in some jurisdictions. This product is not for sale or use in California. Confirm that the intended application is permitted in your area before installation. Fitment includes select 2015-2016 Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500 HD, GMC Sierra 2500 HD, and GMC Sierra 3500 HD models with the 6.6L Duramax engine and 3-bolt flange-style connection.

Features:

• Replaces the restrictive factory downpipe to support improved exhaust flow, fuel economy, and performance.
• Direct-fit design connects to the stock exhaust system and retains factory mounting points.
• Bolt-on installation is engineered for vehicles with a 3-bolt flange-style connection.
• Designed for select 2015-2016 Chevrolet Silverado and GMC Sierra 6.6L Duramax applications.

Fitments:
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
2016 Chevrolet Express 2500 Base
2016 Chevrolet Express 3500 Base
2016 Chevrolet Express 3500 LS
2016 Chevrolet Express 3500 LT
2016 Chevrolet Silverado 2500 HD High Country
2016 Chevrolet Silverado 2500 HD LT
2016 Chevrolet Silverado 2500 HD LTZ
2016 Chevrolet Silverado 2500 HD WT
2016 Chevrolet Silverado 3500 HD High Country
2016 Chevrolet Silverado 3500 HD LT
2016 Chevrolet Silverado 3500 HD LTZ
2016 Chevrolet Silverado 3500 HD WT
2016 GMC Savana 2500 Base
2016 GMC Savana 3500 Base
2016 GMC Savana 3500 LS
2016 GMC Savana 3500 LT
2016 GMC Sierra 2500 HD Base
2016 GMC Sierra 2500 HD Denali
2016 GMC Sierra 2500 HD SLE
2016 GMC Sierra 2500 HD SLT
2016 GMC Sierra 3500 HD Base
2016 GMC Sierra 3500 HD Denali
2016 GMC Sierra 3500 HD SLE
2016 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