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 Converter Left To Extension Pipe Left Exhaust Pipe Flange Gasket for 2006-2009 Chevrolet Express 3500 4.8L 6.0L V8Special Price $13.21 Regular Price $18.99