MBRP 2001-2007 4" XP SERIES DOWNPIPE-BACK EXHAUST SYSTEM S6004409
MBRP's 2001-2007 XP Series is the performance exhaust of choice for the enthusiast who needs a system that can take anything that the road throws at it. This system's rugged sixteen gauge T409 construction can be counted on to withstand everything from salt to rocks, tar to grime.
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.