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 Exhaust System Insulator for 1994-1995 Chevrolet C1500 6.5L V8Special Price $9.51 Regular Price $13.99
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- Walker Front Pipe Inlet Front Exhaust Pipe Flange Gasket for 2009-2011 Mazda Tribute 2.5L L4Special Price $2.25 Regular Price $2.99
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- Walker Converter Exhaust System Insulator for 2001-2004 Mazda Tribute 3.0L V6Special Price $4.99 Regular Price $6.99
- Walker Converter Exhaust System Insulator for 2005-2017 Toyota Tacoma 2.7L L4Special Price $4.99 Regular Price $6.99
- Walker Converter Exhaust System Insulator for 2004-2007 Toyota Highlander 2.4L L4Special Price $5.26 Regular Price $7.99
- Walker Front Pipe Inlet Front Exhaust Pipe Flange Gasket for 1984-1987 Dodge Colt 2.0L L4Special Price $5.77 Regular Price $7.99
- Walker Front Pipe Inlet Front Exhaust Pipe Flange Gasket for 1995 Nissan 200SX 1.6L L4Special Price $7.12 Regular Price $9.99
- Walker Converter Exhaust System Insulator for 1999-2000 GMC K2500 6.5L V8Special Price $9.51 Regular Price $13.99
- Walker Converter Exhaust System Insulator for 2009-2016 Ford E-350 Super Duty 5.4L V8Special Price $9.51 Regular Price $13.99
- Walker Converter Exhaust System Insulator for 2009-2014 Ford E-150 5.4L V8Special Price $9.51 Regular Price $13.99
- Walker Converter Exhaust System Insulator for 2003-2005 GMC Savana 2500 4.3L 5.3L V6 V8Special Price $9.51 Regular Price $13.99
- Walker Converter Exhaust System Insulator for 1994-1995 GMC C1500 6.5L V8Special Price $9.51 Regular Price $13.99
- Walker Converter Exhaust System Insulator for 2007 GMC Sierra 2500 HD Classic 6.6L V8Special Price $9.51 Regular Price $13.99
- Walker Converter Exhaust System Insulator for 1999-2000 GMC C2500 6.5L V8Special Price $9.51 Regular Price $13.99
- Walker Converter Exhaust System Insulator for 2001-2006 GMC Sierra 2500 HD 6.6L V8Special Price $9.51 Regular Price $13.99
- Walker Converter Exhaust System Insulator for 1998-2000 Chevrolet K3500 6.5L V8Special Price $9.87 Regular Price $13.99
- Walker Converter Exhaust System Insulator for 1998-2000 GMC K3500 6.5L V8Special Price $9.87 Regular Price $13.99
- Walker Converter Exhaust System Insulator for 1998-2000 GMC C3500 6.5L V8Special Price $9.87 Regular Price $13.99
- Walker Converter Exhaust System Insulator for 2003-2005 Chevrolet Express 2500 4.3L 5.3L V6 V8Special Price $9.87 Regular Price $13.99
- Walker Converter Exhaust System Insulator for 2003-2008 GMC Savana 1500 4.3L 5.3L V6 V8Special Price $9.87 Regular Price $13.99
- Walker Converter Exhaust System Insulator for 1999-2000 Chevrolet C2500 6.5L V8Special Price $9.87 Regular Price $13.99
- Walker Converter Exhaust System Insulator for 2007 Chevrolet Silverado 2500 HD Classic 6.6L V8Special Price $9.87 Regular Price $13.99
- Walker Converter Exhaust System Insulator for 1999-2000 Chevrolet K2500 6.5L V8Special Price $9.87 Regular Price $13.99
- 2 pc Walker Converter Exhaust System Insulators for 2009-2019 Toyota Corolla 1.8L L4Special Price $10.91 Regular Price $15.99
- 2 pc Walker Converter Exhaust System Insulators for 1988 Mitsubishi Mirage 1.6L L4Special Price $10.91 Regular Price $15.99
- 2 pc Walker Converter Exhaust System Insulators for 2009-2010 Pontiac Vibe 1.8L L4Special Price $10.91 Regular Price $15.99
- 2 pc Walker Converter Exhaust System Insulators for 2009-2013 Toyota Matrix 1.8L L4Special Price $11.30 Regular Price $15.99
- Walker Front Pipe Inlet Front Exhaust Bolt & Spring for 1982-1984 Chevrolet Monte Carlo 5.7L V8Special Price $15.11 Regular Price $21.99
- Walker Front Pipe Inlet Front Exhaust Bolt & Spring for 1981-1984 Pontiac Grand Prix 5.7L V8Special Price $15.11 Regular Price $21.99
- Walker Front Pipe Inlet Front Exhaust Bolt & Spring for 1982-1983 Chevrolet Malibu 5.7L V8Special Price $15.11 Regular Price $21.99
- Walker Front Pipe Inlet Front Exhaust Bolt & Spring for 1982-1983 Buick Regal 5.7L V8Special Price $15.11 Regular Price $21.99
- 2 pc Walker Front Pipe Inlet Front Exhaust Pipe Flange Gaskets for 1996-2004 Acura RL 3.5L V6Special Price $26.67 Regular Price $37.99