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 Rear Exhaust System Insulator for 1999-2000 GMC K2500 6.5L V8Special Price $9.87 Regular Price $13.99
- Walker Int Pipe Rear Exhaust System Insulator for 1999-2000 Chevrolet K2500 6.5L V8Special Price $9.87 Regular Price $13.99
- Walker Int Pipe Rear Exhaust System Insulator for 1999-2000 Chevrolet C2500 6.5L V8Special Price $9.87 Regular Price $13.99
- 2 pc Walker Int Pipe Rear Exhaust System Insulators for 1996-1997 GMC C1500 6.5L V8Special Price $20.51 Regular Price $28.99
- 2 pc Walker Int Pipe Rear Exhaust System Insulators for 1996-1998 Chevrolet C1500 6.5L V8Special Price $20.51 Regular Price $28.99