AFE 49-42021 MACH Force XP 4" Race Down Pipe

2007.5-2012 Dodge 6.7L Cummins
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The AFE 49-42021 MACH Force XP 4" Race Down Pipe for your 2007.5-2012 Dodge 6.7L Cummins is constructed of mandrel bent 409 stainless steel for exceptional durability while providing maximum flow, increased power and lower EGT's. This 4" Downpipe features a factory style flange for an easy installation. MACH Force XP race pipes are the perfect combination of performance, fit and value.

Installation is a Snap:
Installs using the factory mounting locations that provide stability and a hassle-free installation. This updated design is only one-piece for an even easier installation.

Leak-Free Seal:
High quality OE style flanges 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 409 stainless steel tubing for maximum flow. Smooth transition bends allow for low turbulence, increasing horsepower, torque and lowering EGT’s.


  • 409 Stainless Steel Construction
  • 4" Diameter Mandrel Bent For Maximum Flow
  • Removes Catalytic Converter - For Off-Road Use

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install info
cory (arizona) 2/27/2012 10:10 PM
I have had the h&s mini max with just the delete for about a year now. Today I installed the down pipe. It took me two hours by my self. I would suggest getting a buddy to help. Now the 6.7 cummins sounds like it should and it blows smoke with out the tuner turned on. You need to drop your tranny cross member and passenger front fender skirt to install. I am very happy with the down pipe and dpf delete by afe. And the h&s tuner was a good choice my buddies that have smarties wish they got an h&s. Most important xdp has great customer service. I have bought all of my miss from them and I will continue to do so.