Emission controls in older carbureted engines relied on forcing additional air from pumps and valves located just before the exhaust manifold to ensure better burns. This is known as a secondary air injection system, and today has evolved to increase the efficiency of Catalytic Converters. Failed pumps and leaks are common signs of a bad Air Injection System, leading to off air and fuel ratios and poor acceleration. Remember to check the Manifold Gaskets and Seals for wear and tear when examining the exhaust.
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- Walker Right Converter To Muffler Exhaust Clamp for 1999-2004 Chevrolet Silverado 2500 6.0L V8Special Price $4.23 Regular Price $5.99
- Walker Int Pipe To Left Muffler Exhaust Pipe Flange Gasket for 2008-2014 Subaru Tribeca 3.6L H6Special Price $5.77 Regular Price $7.99
- Walker Right Converter To Muffler Exhaust Clamp for 2006 Chevrolet Silverado 3500 6.0L 8.1L V8Special Price $4.23 Regular Price $5.99
- Walker Right Converter To Muffler Exhaust Clamp for 2002-2006 GMC Sierra 1500 HD 6.0L V8Special Price $4.23 Regular Price $5.99
- Walker Int Pipe To Left Muffler Exhaust Clamp for 1984-1986 GMC C1500 Suburban 6.2L V8Special Price $4.23 Regular Price $5.99
- Walker Int Pipe To Left Muffler Exhaust Clamp for 1987-1991 GMC R1500 Suburban 6.2L V8Special Price $4.23 Regular Price $5.99
- Walker Right Converter To Muffler Exhaust Clamp for 2007 GMC Sierra 3500 Classic 6.0L 8.1L V8Special Price $4.23 Regular Price $5.99
- Walker Int Pipe To Left Muffler Exhaust Clamp for 1987-1991 GMC R2500 Suburban 6.2L V8Special Price $4.23 Regular Price $5.99
- Walker Right Converter To Muffler Exhaust Clamp for 1996-2000 Chevrolet C2500 5.7L 7.4L V8Special Price $4.23 Regular Price $5.99
- Walker Int Pipe To Left Muffler Exhaust Clamp for 1989-1991 Chevrolet R1500 Suburban 6.2L V8Special Price $4.49 Regular Price $5.99
- Walker Int Pipe To Left Muffler Exhaust Clamp for 1987-1988 Chevrolet R10 Suburban 6.2L V8Special Price $4.49 Regular Price $5.99
- Walker Right Converter To Muffler Exhaust Clamp for 1999-2004 GMC Sierra 2500 6.0L V8Special Price $4.49 Regular Price $5.99
- Walker Int Pipe To Left Muffler Exhaust Clamp for 1984-1986 GMC C2500 Suburban 6.2L V8Special Price $4.49 Regular Price $5.99
- Walker Int Pipe To Left Muffler Exhaust Clamp for 1989-1991 Chevrolet R2500 Suburban 6.2L V8Special Price $4.49 Regular Price $5.99
- Walker Right Converter To Muffler Exhaust Clamp for 2001-2006 Chevrolet Silverado 2500 HD 6.0L 8.1L V8Special Price $4.23 Regular Price $4.49
- Walker Right Converter To Muffler Exhaust Clamp for 1996-2000 GMC K3500 5.7L 7.4L V8Special Price $4.49 Regular Price $5.99
- Walker Right Converter To Muffler Exhaust Clamp for 2007 Chevrolet Silverado 3500 Classic 6.0L 8.1L V8Special Price $7.12 Regular Price $9.99
- Walker Right Converter To Muffler Exhaust Clamp for 2004-2006 Chevrolet Silverado 3500 6.0L 8.1L V8Special Price $7.12 Regular Price $9.99
- Walker Right Converter To Muffler Exhaust Clamp for 1996-1999 GMC Savana 1500 5.7L V8Special Price $7.12 Regular Price $9.99
- Walker Right Converter To Muffler Exhaust Clamp for 2004-2006 GMC Sierra 3500 6.0L 8.1L V8Special Price $7.12 Regular Price $9.99
- Walker Right Converter To Muffler Exhaust Clamp for 2001-2006 Chevrolet Silverado 2500 HD 6.0L 8.1L V8Special Price $7.44 Regular Price $10.99
- Walker Right Converter To Muffler Exhaust Clamp for 1996-1999 Chevrolet Express 1500 5.7L V8Special Price $7.44 Regular Price $10.99
- Walker Right Converter To Muffler Exhaust Clamp for 1996-2000 GMC Savana 3500 5.7L 7.4L V8Special Price $7.44 Regular Price $10.99
- Walker Right Converter To Muffler Exhaust Clamp for 2007 GMC Sierra 3500 Classic 6.0L 8.1L V8Special Price $7.44 Regular Price $10.99
- Walker Right Converter To Muffler Exhaust Clamp for 1996-2000 Chevrolet Express 2500 5.7L V8Special Price $7.44 Regular Price $10.99
- Walker Right Converter To Muffler Exhaust Pipe Flange Gasket for 2003-2009 Chevrolet Express 2500 4.8L 6.0L V8Special Price $12.78 Regular Price $17.99
- Walker Right Converter To Muffler Exhaust Pipe Flange Gasket for 2003-2009 GMC Savana 2500 4.8L 6.0L V8Special Price $12.78 Regular Price $17.99
- Walker Right Converter To Muffler Exhaust Pipe Flange Gasket for 2003-2010 Chevrolet Express 3500 4.8L 6.0L V8Special Price $12.78 Regular Price $17.99
- Walker Right Converter To Muffler Exhaust Pipe Flange Gasket for 2003-2010 GMC Savana 3500 4.8L 6.0L V8Special Price $12.78 Regular Price $17.99