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.
Filter By Part Details
- Walker Int Pipe Left Exhaust System Insulator for 1996-2000 GMC C2500 5.7L 7.4L V8Special Price $9.51 Regular Price $13.99
- Walker Int Pipe Left Exhaust System Insulator for 1996-2000 Chevrolet K2500 5.7L 7.4L V8Special Price $9.87 Regular Price $13.99
- Walker Converter Inlet Front Right Exhaust Pipe Flange Gasket for 2005-2015 Nissan Xterra 4.0L V6Special Price $3.08 Regular Price $3.99
- Walker Converter Inlet Front Right Exhaust Pipe Flange Gasket for 2005-2018 Nissan Frontier 4.0L V6Special Price $3.08 Regular Price $3.99
- Walker Converter Inlet Front Right Exhaust Pipe Flange Gasket for 2009-2012 Suzuki Equator 4.0L V6Special Price $3.31 Regular Price $4.99
- Walker Converter Inlet Front Right Exhaust Pipe Flange Gasket for 2005-2012 Nissan Pathfinder 4.0L V6Special Price $3.31 Regular Price $4.99
- Walker Int Pipe Left Exhaust System Insulator for 1996-2000 Chevrolet C2500 5.7L 7.4L V8Special Price $9.51 Regular Price $13.99
- Walker Int Pipe Left Exhaust System Insulator for 1996-2000 GMC C3500 5.7L 7.4L V8Special Price $9.51 Regular Price $13.99
- Walker Int Pipe Left Exhaust System Insulator for 1996-2000 Chevrolet C3500 5.7L 7.4L V8Special Price $9.51 Regular Price $13.99
- Walker Int Pipe Left Exhaust System Hanger for 1979-1988 GMC P3500 6.2L 7.4L V8Special Price $9.78 Regular Price $13.99
- Walker Int Pipe Left Exhaust System Hanger for 1975-1988 Chevrolet P30 6.2L 7.4L V8Special Price $9.78 Regular Price $13.99
- Walker Int Pipe Left Exhaust System Insulator for 1996-2000 Chevrolet K3500 5.7L 7.4L V8Special Price $9.87 Regular Price $13.99