MBRP GMCA425 Armor Lite 3-Inch Turbocharger Downpipe for 2001-2004 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; Incl. Mounting Gasket; 4.5 in. Outlet Diameter Tip; Fits Early 2004 Models.

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

Improve exhaust flow on your early-model Duramax with the MBRP GMCA425 Armor Lite Turbocharger Downpipe. Designed as a direct replacement for the restrictive factory downpipe, this 3-inch downpipe helps support improved engine breathing, fuel economy, and overall performance. The 4.5-inch outlet tip provides a clean transition to the remaining exhaust system while maintaining compatibility with the stock exhaust configuration.

The MBRP GMCA425 is engineered to retain factory mounting points and install directly in place of the original component. Its bolt-on design simplifies installation and includes a mounting gasket for a dependable fit. This downpipe is intended for early 2004 applications and fits select 2001-2004 Chevrolet Silverado 2500 HD models equipped with the 6.6L Duramax engine. Verify vehicle application before ordering.

• Feature: 3-inch diameter turbocharger downpipe supports increased exhaust flow compared with the restrictive factory design.
• Feature: Direct-fit construction connects to the stock exhaust system and retains factory mounting points.
• Feature: Bolt-on installation simplifies replacement without requiring custom fabrication.
• Feature: Includes a mounting gasket and 4.5-inch outlet tip for installation-ready performance.

Specifications and Technical Data

• Brand: MBRP
• Part Number: GMCA425
• Series: Armor Lite
• Part Type: Turbocharger downpipe
• Pipe Diameter: 3 inches
• Outlet Tip Diameter: 4.5 inches
• Installation Type: Bolt-on, direct replacement
• Emissions Information: EPA compliant; not for sale or use in California

What's Included

• MBRP GMCA425 Armor Lite turbocharger downpipe
• Mounting gasket

Fitment

Fits select 2001-2004 Chevrolet Silverado 2500 HD models with the 6.6L Duramax engine, including early 2004 applications. Removal of OEM catalytic converters may violate emissions laws in some jurisdictions. Confirm local regulations and vehicle compatibility before installation.

Features:

• 3-inch downpipe design improves exhaust flow and supports better engine performance.
• Direct-fit replacement connects to the stock exhaust system.
• Retains factory mounting points for straightforward installation.
• Bolt-on design includes a mounting gasket and 4.5-inch outlet tip.

Fitments:
2001 Chevrolet Silverado 2500 HD Base
2001 Chevrolet Silverado 2500 HD LS
2001 Chevrolet Silverado 2500 HD LT
2001 Chevrolet Silverado 3500 Base
2001 Chevrolet Silverado 3500 LS
2001 Chevrolet Silverado 3500 LT
2001 GMC Sierra 2500 HD SL
2001 GMC Sierra 2500 HD SLE
2001 GMC Sierra 2500 HD SLT
2001 GMC Sierra 3500 SL
2001 GMC Sierra 3500 SLE
2001 GMC Sierra 3500 SLT
2002 Chevrolet Silverado 2500 HD Base
2002 Chevrolet Silverado 2500 HD LS
2002 Chevrolet Silverado 2500 HD LT
2002 Chevrolet Silverado 3500 Base
2002 Chevrolet Silverado 3500 LS
2002 Chevrolet Silverado 3500 LT
2002 GMC Sierra 2500 HD Base
2002 GMC Sierra 2500 HD SL
2002 GMC Sierra 2500 HD SLE
2002 GMC Sierra 2500 HD SLT
2002 GMC Sierra 3500 Base
2002 GMC Sierra 3500 SL
2002 GMC Sierra 3500 SLE
2002 GMC Sierra 3500 SLT
2003 Chevrolet Silverado 2500 HD Base
2003 Chevrolet Silverado 2500 HD LS
2003 Chevrolet Silverado 2500 HD LT
2003 Chevrolet Silverado 3500 Base
2003 Chevrolet Silverado 3500 LS
2003 Chevrolet Silverado 3500 LT
2003 GMC Sierra 2500 HD Base
2003 GMC Sierra 2500 HD SLE
2003 GMC Sierra 2500 HD SLT
2003 GMC Sierra 2500 HD WT
2003 GMC Sierra 3500 Base
2003 GMC Sierra 3500 SLE
2003 GMC Sierra 3500 SLT
2004 Chevrolet Silverado 2500 HD Base
2004 Chevrolet Silverado 2500 HD LS
2004 Chevrolet Silverado 2500 HD LT
2004 Chevrolet Silverado 2500 HD WT
2004 Chevrolet Silverado 3500 Base
2004 Chevrolet Silverado 3500 LS
2004 Chevrolet Silverado 3500 LT
2004 Chevrolet Silverado 3500 WT
2004 GMC Sierra 2500 HD Base
2004 GMC Sierra 2500 HD SLE
2004 GMC Sierra 2500 HD SLT
2004 GMC Sierra 2500 HD WT
2004 GMC Sierra 3500 Base
2004 GMC Sierra 3500 SLE
2004 GMC Sierra 3500 SLT
2004 GMC Sierra 3500 WT

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