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 Rear Converter To Resonator Exhaust Pipe Flange Gasket for 2009-2016 Subaru Forester 2.5L H4Special Price $19.23 Regular Price $26.99
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- Walker Converter Left Exhaust System Insulator for 2007-2017 Toyota Tundra 4.0L 4.6L 4.7L 5.7L V6 V8Special Price $4.99 Regular Price $6.99
- Walker Converter Left Exhaust System Insulator for 2007 Chevrolet Silverado 3500 Classic 6.0L 8.1L V8Special Price $9.51 Regular Price $13.99
- Walker Converter Left Exhaust System Insulator for 2003-2009 Chevrolet Express 2500 4.8L 6.0L V8Special Price $9.51 Regular Price $13.99
- Walker Converter Left Exhaust System Insulator for 2003-2010 Chevrolet Express 3500 4.8L 6.0L V8Special Price $9.51 Regular Price $13.99
- Walker Converter Left Exhaust System Insulator for 2003-2010 GMC Savana 3500 4.8L 6.0L V8Special Price $9.87 Regular Price $13.99
- Walker Converter Left Exhaust System Insulator for 2007 GMC Sierra 3500 Classic 6.0L 8.1L V8Special Price $9.87 Regular Price $13.99
- Walker Converter Left Exhaust System Insulator for 2001-2006 GMC Sierra 2500 HD 6.0L 8.1L V8Special Price $9.87 Regular Price $13.99
- Walker Converter Left Exhaust System Insulator for 2001-2006 GMC Yukon 6.0L V8Special Price $9.87 Regular Price $13.99
- Walker Rear Converter To Resonator Exhaust Bolt & Spring for 2009-2016 Subaru Forester 2.5L H4Special Price $12.32 Regular Price $17.99
- Walker Rear Converter To Resonator Exhaust Bolt & Spring for 2010-2017 Subaru Outback 2.5L H4Special Price $12.32 Regular Price $17.99
- Walker Rear Converter To Resonator Exhaust Bolt & Spring for 2010-2017 Subaru Legacy 2.5L H4Special Price $12.32 Regular Price $17.99
- Walker Rear Converter To Resonator Exhaust Bolt & Spring for 2013-2015 Subaru XV Crosstrek 2.0L H4Special Price $12.32 Regular Price $17.99
- Walker Rear Converter To Resonator Exhaust Bolt & Spring for 2016 Subaru Crosstrek 2.0L H4Special Price $12.75 Regular Price $17.99
- Walker Rear Converter To Resonator Exhaust Pipe Flange Gasket for 2008-2016 Subaru Impreza 2.0L 2.5L H4Special Price $18.68 Regular Price $26.99