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USD 679.24 720.09
Part #:

AFE 49-44080 Large Bore HD 4" Dual Filter-Back Exhaust System

2016 GM 6.6L Duramax (Fits Crew & Extended Cabs with NOX Sensor)
Part #:
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The AFE 49-44080 Large Bore HD 4" Dual Filter-Back Exhaust System is built from 4" mandrel bent 409 stainless steel and provides your 2016 GM 6.6L Duramax with increased flow and enhanced styling. This exhaust system uses all factory mounting locations and comes with a bolt-on bracket that supports the driver side tailpipe. This provides for a quick, hassle-free installation with no modification necessary. Also included in this exhaust system are dual massive 6" exhaust tips with laser-cut stainless steel aFe power badges. Large Bore-HD exhaust systems are the perfect combination of performance, fit and value. All aFe exhaust systems are engineered and manufactured in their Corona, California manufacturing facility.

Single To Dual Exhaust Conversion:
This exhaust is designed to convert the standard single exhaust into an aggressive dual exhaust.

Fits With Spare Tire:
This exhaust system fits perfectly without relocating the spare tire.

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 from 4" mandrel-bent stainless steel tubing for maximum flow. Smooth transition bends allow for low turbulence, increasing horsepower, torque and lowering EGTs.

Exhaust Tips:
Finishing off the exhaust are your choice of  dual high luster, polished 304 stainless steel slash-cut tips, or high temp black coated exhaust tips. Each tip features a laser-cut stainless steel aFe power badge for an aggressive style.


  • Filter-Back 
  • Fits Models With NOX Sensor
  • 4" Mandrel Bent Stainless Steel 
  • Your Choice Of Black Or Polished Exhaust Tips 
  • Fits All Crew & Extended Cab Applications 
Note: This exhaust system is intended for use on models with the NOX Sensor. Cutting is required for some cab configurations. All Crew & Extended Cab fitment applies to 2500HD/3500HD Pickups. This system is not intended for use on Cab & Chassis models.

Extended Cab/Short Bed, 6.6ft Bed, 143.5 Wheelbase
Crew Cab/Short Bed, 6.6ft Bed, 153.7 Wheelbase
Extended Cab/Long Bed, 8ft Bed, 158.1 Wheelbase
Crew Cab/Long Bed, 8ft Bed, 167.7 Wheelbase

Product Options:
49-44080-B - Black Exhaust Tips 
49-44080-P - Polished Exhaust Tips 


  • Manufacturer Name AFE
  • Shipping Weight 60.00 lb.
  • Shipping Length 60 in.
  • Shipping Width 14 in.
  • Shipping Height 19 in.
  • Warranty Yes
  • Warranty Info 2 Year
  • Prop 65 WARNING: Cancer & Reproductive Harm -


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Questions and Answers

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Most Popular Questions

Will this system work on a long wheelbase 3500 HD crew cab dually?
View Staff Answer 

Yes, the system will fit all wheelbase trucks except Cab & Chassis.