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 Front Pipe To Muffler Exhaust Clamp for 1967-1974 GMC G15 G1500 Van 3.8L 4.1L L6Special Price $3.96 Regular Price $5.99
- Walker Front Pipe To Muffler Exhaust Clamp for 1966 GMC PB25 Series 4.1L L6Special Price $3.96 Regular Price $5.99
- Walker Converter Exhaust System Insulator for 1994-1995 Chevrolet C1500 6.5L V8Special Price $9.51 Regular Price $13.99
- Walker Converter Exhaust System Insulator for 2009-2014 Ford E-250 5.4L V8Special Price $9.87 Regular Price $13.99
- Walker Front Pipe To Muffler Exhaust Clamp for 1971-1974 Chevrolet G30 Van 4.1L 4.8L L6Special Price $3.71 Regular Price $4.99
- Walker Front Pipe To Muffler Exhaust Clamp for 1973-1975 Ford F-250 3.9L 4.9L L6Special Price $3.71 Regular Price $4.99
- Walker Front Pipe To Muffler Exhaust Clamp for 1971-1972 Chevrolet C20 Pickup 4.1L 4.8L L6Special Price $3.71 Regular Price $4.99
- Walker Front Pipe To Muffler Exhaust Clamp for 1963-1967 Chevrolet P20 Series 3.8L 4.1L 4.8L L6Special Price $3.71 Regular Price $4.99
- Walker Front Pipe To Muffler Exhaust Clamp for 1968-1972 Chevrolet P20 Van 4.1L 4.8L L6Special Price $3.71 Regular Price $4.99
- Walker Front Pipe To Muffler Exhaust Clamp for 1967-1972 GMC P25 P2500 Van 4.1L 4.8L L6Special Price $3.96 Regular Price $5.99
- Walker Front Pipe To Muffler Exhaust Clamp for 1967-1970 GMC K15 K1500 Pickup 3.8L 4.1L 4.8L L6Special Price $3.96 Regular Price $5.99
- Walker Front Pipe To Muffler Exhaust Clamp for 1967-1970 Chevrolet K20 Pickup 4.1L 4.8L L6Special Price $3.96 Regular Price $5.99
- Walker Front Pipe To Muffler Exhaust Clamp for 1978 Ford F-350 4.9L L6Special Price $3.96 Regular Price $5.99
- Walker Front Pipe To Muffler Exhaust Clamp for 1967-1974 Chevrolet G20 Van 3.8L 4.1L 4.8L L6Special Price $3.96 Regular Price $5.99
- Walker Front Pipe To Muffler Exhaust Clamp for 1963-1967 Chevrolet P30 Series 3.8L 4.1L 4.8L L6Special Price $3.96 Regular Price $5.99
- Walker Front Pipe To Muffler Exhaust Clamp for 1969-1974 Ford E-200 Econoline 2.8L 3.9L 4.9L L6Special Price $3.96 Regular Price $5.99
- Walker Front Pipe To Muffler Exhaust Clamp for 1963-1966 Chevrolet C30 Pickup 3.8L 4.1L 4.8L L6Special Price $3.96 Regular Price $5.99
- Walker Front Pipe To Muffler Exhaust Clamp for 1969-1974 Ford E-100 Econoline 3.9L L6Special Price $3.96 Regular Price $5.99
- 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 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