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.
Turbo Down Pipe; 3 in.; Black Coated; Not For Use w/3 Bolt Flange Style Connection;
Fits Early 2004 models

Fitment:
Chevrolet Silverado 2500 HD Base 2001
Chevrolet Silverado 2500 HD Base 2002
Chevrolet Silverado 2500 HD Base 2003
Chevrolet Silverado 2500 HD Base 2004
Chevrolet Silverado 2500 HD LS 2001
Chevrolet Silverado 2500 HD LS 2002
Chevrolet Silverado 2500 HD LS 2003
Chevrolet Silverado 2500 HD LS 2004
Chevrolet Silverado 2500 HD LT 2001
Chevrolet Silverado 2500 HD LT 2002
Chevrolet Silverado 2500 HD LT 2003
Chevrolet Silverado 2500 HD LT 2004
Chevrolet Silverado 2500 HD WT 2004
Chevrolet Silverado 3500 Base 2001
Chevrolet Silverado 3500 Base 2002
Chevrolet Silverado 3500 Base 2003
Chevrolet Silverado 3500 Base 2004
Chevrolet Silverado 3500 LS 2001
Chevrolet Silverado 3500 LS 2002
Chevrolet Silverado 3500 LS 2003
Chevrolet Silverado 3500 LS 2004
Chevrolet Silverado 3500 LT 2001
Chevrolet Silverado 3500 LT 2002
Chevrolet Silverado 3500 LT 2003
Chevrolet Silverado 3500 LT 2004
Chevrolet Silverado 3500 WT 2004
GMC Sierra 2500 HD Base 2002
GMC Sierra 2500 HD Base 2003
GMC Sierra 2500 HD Base 2004
GMC Sierra 2500 HD SL 2001
GMC Sierra 2500 HD SL 2002
GMC Sierra 2500 HD SLE 2001
GMC Sierra 2500 HD SLE 2002
GMC Sierra 2500 HD SLE 2003
GMC Sierra 2500 HD SLE 2004
GMC Sierra 2500 HD SLT 2001
GMC Sierra 2500 HD SLT 2002
GMC Sierra 2500 HD SLT 2003
GMC Sierra 2500 HD SLT 2004
GMC Sierra 2500 HD WT 2003
GMC Sierra 2500 HD WT 2004
GMC Sierra 3500 Base 2002
GMC Sierra 3500 Base 2003
GMC Sierra 3500 Base 2004
GMC Sierra 3500 SL 2001
GMC Sierra 3500 SL 2002
GMC Sierra 3500 SLE 2001
GMC Sierra 3500 SLE 2002
GMC Sierra 3500 SLE 2003
GMC Sierra 3500 SLE 2004
GMC Sierra 3500 SLT 2001
GMC Sierra 3500 SLT 2002
GMC Sierra 3500 SLT 2003
GMC Sierra 3500 SLT 2004
GMC Sierra 3500 WT 2004