If you are looking for a highly engineered down pipe look no further than the aFe Power Mach Force XP Down Pipe. Down pipe is 100 percent TIG welded and uses a stepped design that increases exhaust velocity and eliminates low pressure drops which helps to scavange the exhaust for increased intake charge and more power. Race proven strength and durability. Designed using a resonance chamber to help reduce the in-cab resonance found with other down pipes. All hardware and brackets are included for a hassle-free installation.Installation InstructionsThis Part Fits: Year Make Model Submodel 2004-2005 Chevrolet Silverado 2500 HD Base 2005-2006 Chevrolet Silverado 2500 HD LS 2005-2010 Chevrolet Silverado 2500 HD LT 2007-2010 Chevrolet Silverado 2500 HD LTZ 2006-2010 Chevrolet Silverado 2500 HD WT 2007 Chevrolet Silverado 2500 HD Classic LS 2007 Chevrolet Silverado 2500 HD Classic LT 2007 Chevrolet Silverado 2500 HD Classic WT 2004-2005 Chevrolet Silverado 3500 Base 2004-2006 Chevrolet Silverado 3500 LS 2004-2006 Chevrolet Silverado 3500 LT 2004,2006 Chevrolet Silverado 3500 WT 2007 Chevrolet Silverado 3500 Classic LS 2007 Chevrolet Silverado 3500 Classic LT 2007 Chevrolet Silverado 3500 Classic WT 2007-2010 Chevrolet Silverado 3500 HD LT 2007-2010 Chevrolet Silverado 3500 HD LTZ 2007-2010 Chevrolet Silverado 3500 HD WT 2004-2005 GMC Sierra 2500 HD Base 2006 GMC Sierra 2500 HD SL 2004-2010 GMC Sierra 2500 HD SLE 2004-2010 GMC Sierra 2500 HD SLT 2004-2010 GMC Sierra 2500 HD WT 2007 GMC Sierra 2500 HD Classic SL 2007 GMC Sierra 2500 HD Classic SLE 2007 GMC Sierra 2500 HD Classic SLT 2007 GMC Sierra 2500 HD Classic WT 2004-2005 GMC Sierra 3500 Base 2006 GMC Sierra 3500 SL 2004-2006 GMC Sierra 3500 SLE 2004-2006 GMC Sierra 3500 SLT 2004-2006 GMC Sierra 3500 WT 2007 GMC Sierra 3500 Classic SL 2007 GMC Sierra 3500 Classic SLE 2007 GMC Sierra 3500 Classic SLT 2007 GMC Sierra 3500 Classic WT 2007-2010 GMC Sierra 3500 HD SLE 2007-2010 GMC Sierra 3500 HD SLT 2007-2010 GMC Sierra 3500 HD WT
