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Part #:

AFE 49-44043-X Mach Force XP 4" Dual DPF-Back Exhaust System

2011-2016 GM 6.6L Duramax LML (All Cabs & Beds)
Part #:
FROM 679.24
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The AFE 49-44043 Mach Force XP 4" Dual Exhaust System is a sure way to increase flow and add some styling to your 2011-2016 Duramax LML. This system is built from 4" Stainless steel tubing and re-installs using factory mounting locations. Designed a bolt-on kit this system also includes all hardware needed for installation of the second tailpipe as well as high quality band clamps and OE-style bayonet hangers. The final touch is your choice of 2 polished or black powdercoated 6" exhaust tips. 

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 Mach FORCE XP 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.


  • 4" 409 Stainless Steel 
  • Fits With Spare Tire 
  • OE Style Bayonet Hangers 
Note: This exhaust system fits 2016 2500HD models without the NOX Sensor. Not for use on Cab & Chassis models.

Exhaust Tip Finish
Polished 49-44043-P
Black 49-44043-B


  • Manufacturer Name AFE
  • Shipping Weight 50.00 lb.
  • Warranty Yes
  • Warranty Info 2 Year
  • Prop 65 WARNING: Cancer & Reproductive Harm -


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Most Popular Questions

Will this exhaust work with rear Firestone air bags?
View Staff Answer 

The system will work fine with the Firstone Air Bag Helper Springs.