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Part #:

AFE 49-44092 Rebel XD Series 4" Downpipe-Back Race Exhaust System

2017-2018 GM 6.6L Duramax L5P (All Crew & Ext. Cabs)
Part #:
FROM 873.04
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Give your 2017-2018 GM 6.6L Duramax L5P a deep throaty sound with the AFE 49-44092 Rebel XD Series 4" Downpipe-Back Exhaust System. Constructed from 4" mandrel-bent stainless steel tubing, the Rebel XD Series installs easily using the factory mounting locations, and high quality band clamps for a secure fit. Each kit includes your choice of black or polished stainless steel exhaust tips.

High Flow 409 Stainless Steel Muffler:
This 409 stainless steel High-Flow muffler is designed to provide a powerful sound on acceleration, but maintain a smooth sound at idle. This muffler has a straight through perforated core with heat resistant packing to reduce backpressure and maximize flow. Also featuring a stamped aFe POWER logo for an added style. Muffler Specifications: 4" Center Inlet /Outlet, 8" Round x 24" L Body Diameter.

OE Fit:
Features OE-style bayonet hangers to maintain stability during high-rev vibration and high-temp conditions. Provides hassle-free installation.

Flow and Performance:
This Rebel XD exhaust system is constructed of 4" mandrel-bent 409 stainless steel tubing for maximum flow. Smooth transition bends allow for low turbulence, increasing horsepower, torque and throttle response.

Exhaust Tip:
Finishing off this exhaust system are your choice of dual 5" polished stainless steel or black coated slash-cut intercooled exhaust tips with a laser-cut stainless steel "aFe POWER" badge for added style.


  • 4" Downpipe-Back.
  • Stainless Steel Construction
  • High Quality Band Clamps & OE Style Bayonet Hangers
Fitment Guide:
Extended Cab/Short Bed, 6.6 ft. Bed, 143.5 Wheelbase
Crew Cab/Short Bed, 6.6 ft. Bed, 153.7 Wheelbase
Extended Cab/Long Bed, 8 ft. Bed, 158.1 Wheelbase
Crew Cab/Long Bed, 8 ft. Bed, 167.7 Wheelbase
Fitment applies to 2500/3500 Pickups only.
This system does not fit on Cab & Chassis models.
Cutting required for some cab configurations.

Product Options:
49-44092-P - Polished Exhaust Tips
49-44092-B - Black Exhaust Tips

Warning: This free-flow race exhaust system requires the use of an aftermarket performance programmer with off-road tuning. 


  • Manufacturer Name AFE
  • Shipping Weight 80.00 lb.
  • 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.