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Part #: AFE46-40012

AFE 46-40012 BladeRunner Ductile Iron Exhaust Manifold

2003-2007 Dodge 5.9L Cummins
Part #: AFE46-40012
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The AFE 46-40012 BladeRunner Ductile Iron Exhaust Manifold for your 03-07 Dodge 5.9L Cummins sets a new standard in manifold design. In recent testing, this exhaust manifold outflowed the factory exhaust manifold by up to 23%, improving performance and throttle response. The thick wall (0.25"" vs. 0.15"") T3 flange design increases strength, eliminating warping and cracking prevalent in the factory exhaust manifolds. The matched ports and merged runner design reduces exhaust backpressure, maximizing exhaust flow. Once you install this awesome exhaust manifold, you will feel quicker turbo spool up times, improved throttle response and increased performance. Gaskets Not Included. 

One-Piece Construction:
This manifold is constructed of durable cast ductile iron with a reinforcing rib for maximum strength between the port flanges. 

Dual Auxiliary Ports:
Two Exhaust Gas Temperature (EGT) probe ports are supplied for easy installation of gauges or testing equipment.

Hassle-Free Installation:
 All necessary hardware is included for a hassle-free installation.


  • One-Piece Design 
  • Dual Auxiliary Ports 
  • Ductile Iron Construction
Note: Gaskets and replacement manifold bolts not included.


  • MFG. Number 46-40012
  • Manufacturer Name AFE
  • Shipping Weight 24.00 lb.
  • Shipping Length 6 in.
  • Shipping Width 26 in.
  • Shipping Height 6 in.
  • UPC 802959461372


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Most Popular Questions

Can this be installed on a stock truck? No other fabricating??
View Staff Answer 

The AFE 46-40012 BladeRunner Ductile Iron Exhaust Manifold can be used on a completely stock truck as a replacement of your factory manifold.

Emissions Notice

This product is not legal for sale or street use in California. Certain aftermarket products are subject to governmental emission standards regulated by the California Air Resources Board. In order for these products to be legal on a specific vehicle in California, the part number must receive a CARB Executive Order (EO) number. This number makes the part legal for use only on specific years, makes and models of vehicles. A decal with CARB EO number for these parts must be displayed in the engine bay to satisfy smog inspection requirements.