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Part #: AFE49-44079

AFE 49-44079 MACH Force XP 4" Race Pipe

2007.5-2010 GM 6.6L Duramax LMM (Crew & Ext. Cab, Short Bed)
Part #: AFE49-44079
$ $413.25
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Maximize exhaust flow and eliminate restriction in your race built 2007.5-2010 GM 6.6L Duramax LMM with AFE 49-44079 MACH Force XP 4" Race Pipe. Constructed from 4" mandrel-bent stainless steel tubing, the MACH Force XP Race Pipes are the perfect combination of performance, fit and value. 

Leak-Free Seal:
High quality OE style flanges and band clamps are used for a complete 360 degree sealing surface.

Perfect 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:
MACH Force-Xp exhaust race pipes are constructed of 4" mandrel-bent stainless steel tubing for maximum flow. Smooth transition bends allow for low turbulence, increasing horsepower, torque and lowering EGTs.


  • 4" Stainless Steel Construction
  • High Quality OE Style Flanges 
  • Uses Factory Mounting Locations
  • Retains Factory Tail-Pipe 
Fitment Notes: 
Fits Crew Cab, Short Bed  (153.7" Wheelbase)
Fits Extended Cab/Short Bed (143.5" Wheelbase)

Crew & Extended Cab Fitment applies to GM 2500HD/3500HD Pickups only. This race pipe is not for use on Cab & Chassis models. Aftermarket programmer with off-road tuning is required for use.


  • MFG. Number 49-44079
  • Manufacturer Name AFE
  • Shipping Weight 32.00 lb.
  • Shipping Length 48 in.
  • Shipping Width 10 in.
  • Shipping Height 10 in.
  • UPC 802959600672
  • 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.