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 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 1963-1966 Chevrolet C30 Pickup 3.8L 4.1L 4.8L L6Special Price $3.96 Regular Price $5.99
- Walker Muffler Assm Left Exhaust System Insulator for 2003-2007 Honda Accord 3.0L V6Special Price $7.76 Regular Price $10.99
- Walker Muffler Assm Left Exhaust System Insulator for 2006 Lincoln Zephyr 3.0L V6Special Price $8.09 Regular Price $11.99
- 2 pc Walker Muffler Assm Left Exhaust System Insulators for 2014-2016 Chevrolet Impala Limited 3.6L V6Special Price $16.44 Regular Price $22.99
- 2 pc Walker Muffler Assm Left Exhaust System Insulators for 2006 Chevrolet Monte Carlo 3.9L V6Special Price $16.44 Regular Price $22.99
- 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 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 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 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 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 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 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 1966 GMC PB25 Series 4.1L 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 Muffler Assm Left Exhaust System Insulator for 1994 Lexus LS400 4.0L V8Special Price $4.99 Regular Price $6.99
- Walker Muffler Assm Left Exhaust System Insulator for 2005 Subaru Legacy 2.5L H4Special Price $5.26 Regular Price $7.99
- Walker Muffler Assm Left Exhaust System Insulator for 2008-2012 Honda Accord 3.5L V6Special Price $5.26 Regular Price $7.99
- Walker Muffler Assm Left Exhaust System Insulator for 2009-2013 Infiniti G37 3.7L V6Special Price $7.76 Regular Price $10.99
- Walker Muffler Assm Left Exhaust System Insulator for 2006-2008 Hyundai Sonata 3.3L V6Special Price $7.76 Regular Price $10.99
- Walker Muffler Assm Left Exhaust System Insulator for 2006-2010 Hyundai Azera 3.3L 3.8L V6Special Price $7.76 Regular Price $10.99
- Walker Muffler Assm Left Exhaust System Insulator for 2011-2018 Ford Explorer 3.5L V6Special Price $7.76 Regular Price $10.99
- Walker Muffler Assm Left Exhaust System Insulator for 2004-2008 Acura TSX 2.4L L4Special Price $8.09 Regular Price $11.99
- Walker Muffler Assm Left Exhaust System Insulator for 1990-1995 Nissan 300ZX 3.0L V6Special Price $8.09 Regular Price $11.99
- Walker Muffler Assm Left Exhaust System Insulator for 1990-1993 Lexus LS400 4.0L V8Special Price $8.09 Regular Price $11.99
- Walker Muffler Assm Left Exhaust System Insulator for 2007-2008 Infiniti G35 3.5L V6Special Price $8.09 Regular Price $11.99