AFE 49-44017 Mach Force XP 4" Down-Pipe Back Race Exhaust System

From $679.00 to $699.00
Product Options
Finish :
2007.5-2010 GM 6.6L Duramax LMM
Product Options

* denotes required field

$5 Price Beat Guarantee

The AFE 49-44017 Mach Force XP 4" Down-Pipe Back Race Exhaust System for your 2007.5-2010 GM 6.6L Duramax is engineered to perform in the most extreme environments. This system is constructed from mandrel bent 4" stainless steel tubing for maximum flow, increased horsepower, increased torque and lower EGT’s. The system is available in a 4" down-pipe back with muffler and is finished off with a powder-coated black or polished tip. Mach FORCE XP exhaust systems are the perfect combination of performance, fit and value.

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

Leak-Free Seal:

High quality OE-style flange and band clamps are used for a complete 360 degree sealing surface.

Aggressive Sound:
A free-flowing 24" x 8" long muffler is used to absorb high pitch tones producing a powerful sound and unleashing all available horsepower and torque out of your rig.

OE Fitment:

OE-style hangers with bayonet tip are used to maintain a stable pipe location during high vibration and high heat conditions.

Flow and Performance:

Mach FORCE XP exhaust systems are constructed of 4"" mandrel bent stainless steel tubing for maximum flow. Smooth transition bends allow for low turbulence, increasing horsepower, torque and lowering EGT’s.

Exhaust Tip:
Finishing off the exhaust is a polished or powder-coated black 304 stainless steel exhaust tip. This tip features a drain port on the bottom to keep rust and corrosion away. A unique stainless steel laser-cut aFe Power logo plate is riveted on for an aggressive style.


  • Down-Pipe Back
  • 4" T409 Stainless Steel Construction
  • Stainless Steel Band Clamps
  • Bayonet OE-Style Welded On Hangers
  • Free Flowing Muffler
  • Black Or Polished Exhaust Tip

Exhaust Tip Finish
Polished 49-44017-P
Black 49-44017-B

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

Customer Reviews - Include your order number for a chance to win a $100 GiftCard

(46 Ratings, 0 Reviews) Average Rating: