2007.5-2010 GM Duramax 6.6L LMM Downpipes

The factory downpipes on your 2007.5-2010 GM 6.6L Duramax LMM are extremely restrictive thanks to their small diameter, so we recommended upgrading to a set of aftermarket downpipes for an immediate performance upgrade to your GM 2500/3500. These aftermarket downpipe kits are one of the easiest ways to give your truck an awesome sound while improving it's power, torque, and fuel economy along the way. These kits will even help slightly drop EGTs to help maintain controllable temperatures on your truck without compromise. Choose from the entire selection of downpipes to get the exact look and sound your tough GM truck deserves, and start showing off your performance mods with confidence. GM Duramax Fitments: 2007, 2009, 2010 GM 6.6L Duramax. Submodel Fitments: WT, Custom, LT, LTZ, High Country, 1LT, 2LT, Pro, SLE, SLT, AT4, Denali. Some exceptions apply, please see individual product pages for specific fitments.