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Part #: AFE49-04067

AFE 49-04067 ATLAS 4" Race Pipe

2015.5-2016 GM 6.6L Duramax LML
Part #: AFE49-04067
$311.59 $ $280.43
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The AFE 49-04067 ATLAS 4" Race Pipe for your 2015.5-2016 GM 6.6L Duramax LML is built from 4" mandrel bent aluminized steel tubing. Featuring a unique OE style 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. 

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.


  • Retains Factory Tail-Pipe 
  • 4" Mandrel-Bent Aluminized Tubing 
  • Uses Factory Mounting Points To Provide Stability 
  • OE Style Tapered Flange For 360-Degree Sealing Surface 
  • OE Style Bayonet Hanger To Maintain Stable Pipe Location 
The factory exhaust system will need to be cut prior to installation.
Fits only on models manufactured after July 2014 with flanged downpipe. 
Will not fit on Cab & Chassis models. 
Fits 133.7" to 167.7" wheel bases only.

Fits: Crew Cab/Short Bed (153.7" Wheelbase), Crew Cab/Long Bed (167.7" Wheelbase), Extended Cab/Short Bed (144.2" Wheelbase), Extended Cab/Long Bed (158.2" Wheelbase) & Standard Cab/Long Bed (133.7" Wheelbase) models.

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


  • MFG. Number 49-04067
  • Manufacturer Name AFE
  • Shipping Weight 32.00 lb.
  • Shipping Length 60 in.
  • Shipping Width 13 in.
  • Shipping Height 23 in.
  • UPC 802959492604
  • 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.