AFE POWER Large Bore-HD 3" Stainless Steel Downpipe Back Exhaust System

2016 - 2018 2.8L GM Duramax LWN

SKU NWD-49-44073-P

49-44073-P / 49-44073-B


  • Constructed from 3" mandrel-bent stainless steel tubing
  • Uses a high quality band clamp and OE-style bayonet hangers for a secure fitment
  • Utilizes all factory mounting locations to provide a quick, hassle-free installation
  • Included in this exhaust system is a massive 4-1/2" Dia. polished stainless steel tip with a laser-cut stainless steel aFe power badge
  • Features
  • Videos
  • Instructions
  • Vehicle Fitment

Simple Installation:
This system uses factory mounting locations providing stability and hassle-free installation.

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 3" mandrel-bent stainless steel tubing for maximum flow. Smooth transition bends allow for low turbulence, increasing horsepower, torque and lowering EGT’s.

4-1/2" Diameter Polished Tip:
Finishing off the exhaust is a 4-1/2" diameter, polished, stainless steel slash cut tip with a unique stainless steel laser-cut aFe Power logo plate riveted on for an aggressive style.

Crew Cab/ Short Bed (128.3" Wheelbase)
Crew Cab/ Long Bed (140.5" Wheelbase)
Extended Cab/ Long Bed (128.3" Wheelbase)

This is a "Race Only" product used solely for competition. It's use is limited to closed-course and open-course racing that is formally sanctioned by a recognized racing organization. Any other use including recreational off-road use, could be in violation of local, state and federal laws.

All aFe exhaust systems are engineered and manufactured in their Corona, California manufacturing facility.


2016 - 2018

GM Duramax (Canyon / Colorado)

2.8L LWN