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USD 505.39 526.29
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AFE 49-44085 Large Bore HD 5" Filter-Back Exhaust System

2017-2018 GM 6.6L Duramax L5P (All Crew Cabs)
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Maximize exhaust flow in your 2017-2018 GM 6.6L Duramax L5P with the AFE 49-44085 Large Bore HD 5" Filter-Back Exhaust System. Constructed from 5" mandrel-bent T409 stainless steel, this exhaust system uses a high-quality band clamps and OE style bayonet hangers for secure fitment. Designed to utilize all factory mounting locations, this system installs installs easily with a quick, hassle-free installation. Each exhaust system includes massive 6" diameter polished stainless steel intercooled tips with your choice of polished or powdercoated black exhaust tips.

Simple Installation:
All systems use factory mounting locations providing stability and hassle-free installation.

Leak-Free Seal:
High quality band clamps are included for a complete 360 degree sealing surface.

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 409 stainless steel tubing for maximum flow. Smooth transition bends allow for low turbulence, increasing horsepower, torque and lowering EGTs.

6" Diameter Intercooled Tip:
Finishing off the exhaust is a 6" diameter exhaust tip in your choice of a high luster polished finish, or black powdercoated slash cut tip with intercooling vents designed to reduce exhaust gas temperatures at the tailpipe. A unique stainless aFe Power logo plate is riveted on for an aggressive style.


  • 5" Mandrel-Bent 409 Stainless Steel Tubing
  • High Quality Band Clamps & OE Style Bayonet Hangers
  • Utilizes Factory Mounting Locations For Hassle-Free Installation

Fitment Guide:
Crew Cab/Short Bed, 6.6ft Bed, 153.7 Wheelbase
Crew Cab/Long Bed, 8ft Bed, 167.7 Wheelbase
Cutting the stock exhaust behind the DPF (Diesel Particulate Filter) is required for all cab configurations. All Crew Cabs applies to GM 2500/3500 Pickups. This system is not intended for use on Cab & Chassis applications.

Product Options:
49-44085-P - Polished Exhaust Tip
49-44085-B - Black Powdercoated Exhaust Tip


  • Manufacturer Name AFE
  • Shipping Weight 44.00 lb.
  • Shipping Length 49 in.
  • Shipping Width 13 in.
  • Shipping Height 23 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

Does this eliminate the dpf filter ? I have a 2017 Chevy dueamax and I would like to purchase this exhaust I just. Red to know if this is a complete exhaust system and if it eliminates all these stock components
View Staff Answer 

The AFE 49-44085 LARGE BORE HD 5" FILTER-BACK EXHAUST SYSTEM is a FILTER BACK exhaust system. This system will NOT remove any factory installed emissions equipment.