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USD 942.89 942.89 964.94
Part #:

AFE 49-44060 Large Bore HD 5" Downpipe-Back Exhaust System

2001-2004 GM 6.6L Duramax (Crew & Ext. Cabs)
Part #:
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Exhaust Tip
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The AFE 49-44060 Large Bore HD 5" Downpipe-Back Exhaust System for your 2001-2004 GM 6.6L Duramax is engineered to perform in the most extreme environments. This system is constructed from 5" mandrel bent stainless steel tubing for maximum flow, increased horsepower, increased torque and lower EGTs. This system uses high quality band clamps, OE-style bayonet hangers and includes an adjustable hanger clamp for a tight secure fitment. This system is available with a free-flowing 24" long muffler and includes choice of polished stainless steel or powder coated black 6" diameter clamp-on tip with a laser-cut stainless steel aFe power plate for an aggressive style.

Installation is a Snap:
This Large Bore HD System Includes an extension pipe and an adjustable hanger for a perfect fit. This kit uses factory mounting locations providing stability and hassle-free installation.

Leak-Free Seal:
High quality OE style flange and band clamps are used for a complete 360 degree sealing surface.

Aggressive Sound:
A free-flowing 24" long muffler is used to absorb high pitch tones producing a powerful sound and unleashing all available horsepower and torque out of your rig.

OE Fit:
OE style bayonet hangers are used to maintain a stable pipe location during high vibration and high heat conditions. The Bayonet tip holds the hanger bushing in place for an OE style fit that does not change with time. 

Flow and Performance:
This Large Bore HD exhaust system is constructed of 5" mandrel bent stainless steel tubing for maximum flow. Smooth transition bends allow for low turbulence, increasing horsepower, torque and lowering EGTs.

Exhaust Tip:
Finishing off the exhaust is your choice of a 6" diameter polished stainless steel or black powder coated clamp-on tip with a laser-cut stainless steel aFe power plate for an aggressive style.

  • 5" Mandel Bent 409 Stainless Steel Construction
  • Free-Flowing 24" Muffler For Powerful Sound 
  • Two-piece over Axle Design
  • Leak Free Seal with OE-Style Band Clamps
  • Uses Factory Mounting Locations Easy Bolt-On Installation
  • Made in the USA

Application Note: 
Will fit Crew Cab/Short Bed Models
Will fit Crew Cab/Long Bed Models
Will fit Extended Cab/Short Bed Models
Will fit Extended Cab/Long Bed Models
Does Not fit Cab & Chassis Models

2001-2004 GM 6.6L Duramax 

Product Options

49-44060-P Polished Exhaust Tip
49-44060-B Black Exhaust Tip


  • Manufacturer Name AFE
  • Shipping Weight 87.00 lb.
  • Shipping Length 60 in.
  • Shipping Width 14 in.
  • Shipping Height 19 in.
  • Fuel Type Diesel
  • Warranty Yes
  • Warranty Info 2 Year
  • Prop 65 WARNING: Cancer & Reproductive Harm -


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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.