This aFe POWER turbo downpipe is engineered to outflow and outperform the restrictive, factory downpipe on the 2011 - 2015 GM Truck with V8-6.6L (td) engine. The mandrel bent, stainless steel tubing offers smoother transition bends for increased airflow, delivering quicker turbo spool times. CNC machined V-band inlets and outlets ensure a factory style, 360-degree sealing surface. Both inside and outside surfaces of the downpipe are ceramic coated to reduce EGT's even in the most extreme environments.
Installation Instructions


This Part Fits:

Year	Make	Model	Submodel
2015	Chevrolet	Silverado 2500 HD	High Country
2011-2015	Chevrolet	Silverado 2500 HD	LT
2011-2015	Chevrolet	Silverado 2500 HD	LTZ
2011-2015	Chevrolet	Silverado 2500 HD	WT
2015	Chevrolet	Silverado 3500 HD	High Country
2011-2015	Chevrolet	Silverado 3500 HD	LT
2011-2015	Chevrolet	Silverado 3500 HD	LTZ
2011-2015	Chevrolet	Silverado 3500 HD	WT
2015	GMC	Sierra 2500 HD	Base
2011-2015	GMC	Sierra 2500 HD	Denali
2011-2015	GMC	Sierra 2500 HD	SLE
2011-2015	GMC	Sierra 2500 HD	SLT
2011-2014	GMC	Sierra 2500 HD	WT
2015	GMC	Sierra 3500 HD	Base
2011-2015	GMC	Sierra 3500 HD	Denali
2011-2015	GMC	Sierra 3500 HD	SLE
2011-2015	GMC	Sierra 3500 HD	SLT
2011-2014	GMC	Sierra 3500 HD	WT