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 Int Pipe Exhaust System Insulator for 2004-2007 Ford E-150 5.4L V8Special Price $9.51 Regular Price $13.99
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- Walker Int Pipe Exhaust System Insulator for 1993 GMC K3500 6.5L V8Special Price $9.51 Regular Price $13.99
- Walker Int Pipe Exhaust System Insulator for 2004-2007 Ford E-250 5.4L V8Special Price $9.51 Regular Price $13.99
- Walker Int Pipe Exhaust System Insulator for 1992-1994 Chevrolet G20 5.7L V8Special Price $9.51 Regular Price $13.99
- Walker Int Pipe Exhaust System Insulator for 1993 Chevrolet K2500 6.5L V8Special Price $9.51 Regular Price $13.99
- Walker Int Pipe Exhaust System Insulator for 2010-2017 GMC Terrain 3.0L 3.6L V6Special Price $9.51 Regular Price $13.99
- Walker Int Pipe Exhaust System Insulator for 2004-2005 Ford E-150 Club Wagon 5.4L V8Special Price $9.51 Regular Price $13.99
- Walker Int Pipe Exhaust System Insulator for 1992-1995 GMC C1500 Suburban 5.7L V8Special Price $9.51 Regular Price $13.99
- Walker Int Pipe Exhaust System Insulator for 1992-1993 GMC G1500 5.7L V8Special Price $9.51 Regular Price $13.99
- Walker Int Pipe Exhaust System Insulator for 1991-1996 Chevrolet G30 4.3L 5.7L 7.4L V6 V8Special Price $9.51 Regular Price $13.99
- Walker Int Pipe Exhaust System Insulator for 2001-2006 Chevrolet Suburban 1500 5.3L V8Special Price $9.51 Regular Price $13.99
- Walker Int Pipe Exhaust System Insulator for 1999-2006 GMC Sierra 1500 4.3L 4.8L 5.3L V6 V8Special Price $9.51 Regular Price $13.99
- Walker Int Pipe Exhaust System Insulator for 1999-2006 Chevrolet Silverado 1500 4.3L 4.8L 5.3L V6 V8Special Price $9.51 Regular Price $13.99
- Walker Int Pipe Exhaust System Insulator for 1991 Chevrolet V3500 5.7L V8Special Price $9.51 Regular Price $13.99
- Walker Int Pipe Exhaust System Insulator for 1992-1995 Chevrolet K1500 Suburban 5.7L V8Special Price $9.51 Regular Price $13.99
- Walker Int Pipe Exhaust System Hanger for 1978 GMC C15 5.0L 5.7L V8Special Price $9.78 Regular Price $13.99
- Walker Int Pipe Exhaust System Hanger for 1978-1981 Chevrolet C10 5.0L 5.7L V8Special Price $9.78 Regular Price $13.99
- Walker Int Pipe Exhaust System Hanger for 1980-1986 GMC K1500 5.0L 5.7L V8Special Price $9.78 Regular Price $13.99
- Walker Int Pipe Exhaust System Hanger for 1983-1985 Chevrolet K20 4.8L L6Special Price $9.78 Regular Price $13.99
- Walker Int Pipe Exhaust System Insulator for 2007 Chevrolet Silverado 1500 Classic 4.3L 4.8L 5.3L V6 V8Special Price $9.87 Regular Price $13.99
- Walker Int Pipe Exhaust System Insulator for 1993-1999 GMC C1500 4.3L 5.0L V6 V8Special Price $9.87 Regular Price $13.99
- Walker Int Pipe Exhaust System Insulator for 1992-1995 GMC C2500 Suburban 5.7L V8Special Price $9.87 Regular Price $13.99
- Walker Int Pipe Exhaust System Insulator for 1993 GMC C2500 6.5L V8Special Price $9.87 Regular Price $13.99
- Walker Int Pipe Exhaust System Insulator for 1993 Chevrolet K3500 6.5L V8Special Price $9.87 Regular Price $13.99
- Walker Int Pipe Exhaust System Insulator for 1992-1995 GMC K1500 Suburban 5.7L V8Special Price $9.87 Regular Price $13.99
- Walker Int Pipe Exhaust System Insulator for 1992-1995 Chevrolet C2500 Suburban 5.7L V8Special Price $9.87 Regular Price $13.99
- Walker Int Pipe Exhaust System Insulator for 1993 Chevrolet C2500 6.5L V8Special Price $9.87 Regular Price $13.99
- Walker Int Pipe Exhaust System Insulator for 1991-1996 GMC G3500 4.3L 5.7L 7.4L V6 V8Special Price $9.87 Regular Price $13.99
- Walker Int Pipe Exhaust System Insulator for 1993-1999 GMC K1500 4.3L 5.0L V6 V8Special Price $9.87 Regular Price $13.99
- Walker Int Pipe Exhaust System Insulator for 2010-2017 Chevrolet Equinox 3.0L 3.6L V6Special Price $9.87 Regular Price $13.99
- Walker Int Pipe Exhaust System Insulator for 2002-2006 Chevrolet Avalanche 1500 5.3L V8Special Price $9.87 Regular Price $13.99
- Walker Int Pipe Exhaust System Insulator for 1992-1995 Chevrolet K2500 Suburban 5.7L V8Special Price $9.87 Regular Price $13.99
- Walker Int Pipe Exhaust System Insulator for 1991 GMC V3500 5.7L V8Special Price $9.87 Regular Price $13.99
- Walker Int Pipe Exhaust System Insulator for 1992-1993 Chevrolet G10 5.7L V8Special Price $9.87 Regular Price $13.99
- Walker Int Pipe Exhaust System Insulator for 1993-1999 Chevrolet K1500 4.3L 5.0L V6 V8Special Price $9.87 Regular Price $13.99
- Walker Int Pipe Exhaust System Insulator for 1992-1995 GMC K2500 Suburban 5.7L V8Special Price $9.87 Regular Price $13.99
- Walker Int Pipe Exhaust System Insulator for 1993 GMC K2500 6.5L V8Special Price $9.87 Regular Price $13.99
- Walker Int Pipe Exhaust System Hanger for 1991 GMC Sonoma 2.8L 4.3L V6Special Price $10.15 Regular Price $13.99
- Walker Int Pipe Exhaust System Hanger for 1980-1986 Chevrolet K10 5.0L 5.7L V8Special Price $10.15 Regular Price $13.99
- Walker Int Pipe Exhaust System Hanger for 1982-1988 GMC P2500 6.2L V8Special Price $10.15 Regular Price $13.99
- Walker Int Pipe Exhaust System Hanger for 1987 GMC V1500 5.0L V8Special Price $10.15 Regular Price $13.99
- Walker Int Pipe Exhaust System Hanger for 1988-1991 Chevrolet S10 2.8L 4.3L V6Special Price $10.15 Regular Price $13.99
- Walker Int Pipe Exhaust System Insulator for 1986 Chevrolet Celebrity 2.8L V6Special Price $10.33 Regular Price $14.99