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 Left To Muffler Left Exhaust Clamp for 1982-1986 GMC C3500 6.2L V8Special Price $4.23 Regular Price $5.99
- Walker Int Pipe Left To Muffler Left Exhaust Clamp for 1987 GMC R3500 6.2L V8Special Price $4.23 Regular Price $5.99
- Walker Int Pipe Left To Muffler Left Exhaust Clamp for 1989-1991 Chevrolet V2500 Suburban 6.2L V8Special Price $4.23 Regular Price $5.99
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- Walker Int Pipe Left To Muffler Left Exhaust Clamp for 1987 Chevrolet V30 6.2L V8Special Price $4.49 Regular Price $5.99
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- Walker Resonator Assm Exhaust System Insulator for 1991-1993 Nissan NX 1.6L 2.0L L4Special Price $4.99 Regular Price $6.99