Replace that restrictive factory downpipe with a MBRP direct replacement downpipe for more flow, fuel economy, and better performance. Removal of OEM catalytic converters may be a violation of emissions laws in your jurisdiction. Ensure that the intended use of this product is permitted. Not for sale or use in the state of California.

This Part Fits:

Year	Make	Model	Submodel
2001-2004	Chevrolet	Silverado 2500 HD	Base
2001-2004	Chevrolet	Silverado 2500 HD	LS
2001-2004	Chevrolet	Silverado 2500 HD	LT
2004	Chevrolet	Silverado 2500 HD	WT
2001-2004	Chevrolet	Silverado 3500	Base
2001-2004	Chevrolet	Silverado 3500	LS
2001-2004	Chevrolet	Silverado 3500	LT
2004	Chevrolet	Silverado 3500	WT
2002-2004	GMC	Sierra 2500 HD	Base
2001-2002	GMC	Sierra 2500 HD	SL
2001-2004	GMC	Sierra 2500 HD	SLE
2001-2004	GMC	Sierra 2500 HD	SLT
2003-2004	GMC	Sierra 2500 HD	WT
2002-2004	GMC	Sierra 3500	Base
2001-2002	GMC	Sierra 3500	SL
2001-2004	GMC	Sierra 3500	SLE
2001-2004	GMC	Sierra 3500	SLT
2004	GMC	Sierra 3500	WT