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 Converter Right Exhaust System Insulator for 2007 GMC Sierra 3500 Classic 6.0L 8.1L V8Special Price $9.51 Regular Price $13.99
- Walker Converter Right Exhaust System Insulator for 2004-2006 Chevrolet Silverado 3500 6.0L 8.1L V8Special Price $9.51 Regular Price $13.99
- Walker Converter Right Exhaust System Insulator for 2002-2006 GMC Sierra 1500 HD 6.0L V8Special Price $9.51 Regular Price $13.99
- Walker Converter Right Exhaust System Insulator for 2006-2009 Chevrolet Express 3500 4.8L 6.0L V8Special Price $9.51 Regular Price $13.99
- Walker Converter Right Exhaust System Insulator for 2006-2009 GMC Savana 3500 4.8L 6.0L V8Special Price $9.87 Regular Price $13.99
- Walker Int Pipe To Converter Exhaust Pipe Flange Gasket for 1991-1996 Nissan Sentra 1.6L L4Special Price $2.25 Regular Price $2.99
- Walker Int Pipe To Converter Exhaust Pipe Flange Gasket for 1995-1996 Nissan 200SX 1.6L L4Special Price $2.25 Regular Price $2.99
- Walker Int Pipe To Converter Exhaust Pipe Flange Gasket for 1986-1988 Nissan Stanza 2.0L L4Special Price $2.56 Regular Price $3.99
- Walker Int Pipe To Converter Exhaust Pipe Flange Gasket for 1989-1995 Nissan Pathfinder 3.0L V6Special Price $4.52 Regular Price $5.99
- Walker Int Pipe To Converter Exhaust Clamp for 1990 Chevrolet C3500 5.7L V8Special Price $7.12 Regular Price $9.99
- Walker Converter Right Exhaust System Insulator for 2001-2006 GMC Sierra 2500 HD 6.0L 8.1L V8Special Price $9.51 Regular Price $13.99
- Walker Converter Right Exhaust System Insulator for 1999-2004 GMC Sierra 2500 6.0L V8Special Price $9.51 Regular Price $13.99
- Walker Converter Right Exhaust System Insulator for 1999-2004 Chevrolet Silverado 2500 6.0L V8Special Price $9.51 Regular Price $13.99
- Walker Converter Right Exhaust System Insulator for 1996-2000 Chevrolet K2500 5.7L 7.4L V8Special Price $9.51 Regular Price $13.99
- Walker Converter Right Exhaust System Insulator for 1996-2000 GMC K2500 5.7L 7.4L V8Special Price $9.87 Regular Price $13.99
- Walker Converter Right Exhaust System Insulator for 1996-2000 Chevrolet C2500 5.7L 7.4L V8Special Price $9.87 Regular Price $13.99
- Walker Converter Right Exhaust System Insulator for 2004-2006 GMC Sierra 3500 6.0L 8.1L V8Special Price $9.87 Regular Price $13.99
- Walker Converter Right Exhaust System Insulator for 1996-2000 GMC C2500 5.7L 7.4L V8Special Price $9.87 Regular Price $13.99
- Walker Int Pipe To Converter Exhaust Bolt & Spring for 1990-1991 Honda Civic 1.6L L4Special Price $12.32 Regular Price $17.99
- Walker Int Pipe To Converter Exhaust Bolt & Spring for 1990-1993 Acura Integra 1.8L L4Special Price $12.75 Regular Price $17.99