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Part #: AFE49-04055

AFE 49-04055 ATLAS 4" Race Front Pipe

2015.5-2016 GM 6.6L Duramax LML (Fits 133.7"-167.7" Wheelbases)
Part #: AFE49-04055
$ $223.25
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The AFE 49-04055 ATLAS 4" Race Front Pipe for your 2015.5-2016 GM 6.6L Duramax is constructed from 4" mandrel bent aluminized steel tubing for maximum flow, increased horsepower and torque. The Race pipe is designed with a unique tapered flange to fit the flanged down pipes found on models built after July 2014. Atlas exhaust race pipes are the perfect combination of performance, fit and value.

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

Leak-Free Seal:
A unique tapered OE style flange is used for a complete 360 degree sealing surface.

Perfect Fit:
A OE style bayonet hanger is 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 ATLAS exhaust race pipe is constructed of 4" mandrel bent aluminized steel tubing for maximum flow. Smooth transition bends allow for low turbulence, increasing horsepower, torque and lowering EGTs.3


  • For Race Use 
  • 4" Mandrel Bent Aluminized Steel Tubing
  • Utilizes Factory Mounting Locations For Easy Install
Application Note: These kits will only fit models manufactured after July 2014 equipped with a flanged down pipe. Does not fit cab & chassis, Fits 133.7" to 167.7" wheel bases only.

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


  • MFG. Number 49-04055
  • Manufacturer Name AFE
  • Shipping Weight 21.00 lb.
  • Shipping Length 10 in.
  • Shipping Width 10 in.
  • Shipping Height 48 in.
  • UPC 802959492567
  • 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.