AFE 49-44017 MACH FORCE XP 4" DOWN-PIPE BACK RACE EXHAUST SYSTEM
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 EGTs.
AFE 49-04059NM ATLAS 4" DOWNPIPE-BACK NO MUFFLER EXHAUST SYSTEM
The AFE 49-04059NM ATLAS 4" Downpipe-Back No Muffler Exhaust System for your 2001-2010 GM 6.6L Duramax features a 4" mandrel bent construction and a mufflerless "straight-pipe" design for maximum flow, increased horsepower, increased torque and lower EGTs.