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 Exhaust System Insulator for 1996-2000 GMC C2500 5.7L 7.4L V8Special Price $9.51 Regular Price $13.99
- Walker Int Pipe Left Exhaust System Insulator for 1996-2000 Chevrolet K2500 5.7L 7.4L V8Special Price $9.87 Regular Price $13.99
- Walker Int Pipe Front To Rear Exhaust Clamp for 1985 Cadillac Fleetwood 4.3L V6Special Price $3.71 Regular Price $4.99
- Walker Int Pipe Front To Rear Exhaust Clamp for 1985 Buick Electra 4.3L V6Special Price $3.96 Regular Price $5.99
- Walker Int Pipe Front To Rear Exhaust Clamp for 1987-1995 Ford F-250 4.9L 5.0L L6 V8Special Price $3.99 Regular Price $5.99
- Walker Int Pipe Front To Rear Exhaust Clamp for 1987-1995 Ford F-150 4.9L 5.0L L6 V8Special Price $3.99 Regular Price $5.99
- Walker Int Pipe Front To Rear Exhaust Clamp for 1965-1967 Cadillac Fleetwood 7.0L V8Special Price $4.23 Regular Price $5.99
- Walker Int Pipe Front To Rear Exhaust Clamp for 1982-1987 GMC P2500 5.7L V8Special Price $4.23 Regular Price $5.99
- Walker Int Pipe Front To Rear Exhaust Clamp for 1965-1967 Cadillac DeVille 7.0L V8Special Price $4.23 Regular Price $5.99
- Walker Int Pipe Front To Rear Exhaust Clamp for 1988-1995 Ford F-350 5.8L 7.5L V8Special Price $4.49 Regular Price $5.99
- Walker Int Pipe Front To Rear Exhaust Clamp for 1997-1999 Ford F-250 4.6L 5.4L V8Special Price $4.49 Regular Price $5.99
- Walker Int Pipe Front To Rear Exhaust Clamp for 1992-1996 Chevrolet G30 5.7L V8Special Price $7.44 Regular Price $10.99
- Walker Int Pipe Front To Rear Exhaust Clamp for 1992-1996 GMC G3500 5.7L V8Special Price $7.44 Regular Price $10.99
- Walker Int Pipe Left Exhaust System Insulator for 1996-2000 Chevrolet C2500 5.7L 7.4L V8Special Price $9.51 Regular Price $13.99
- Walker Int Pipe Left Exhaust System Insulator for 1996-2000 GMC C3500 5.7L 7.4L V8Special Price $9.51 Regular Price $13.99
- Walker Int Pipe Left Exhaust System Insulator for 1996-2000 Chevrolet C3500 5.7L 7.4L V8Special Price $9.51 Regular Price $13.99
- Walker Int Pipe Left Exhaust System Hanger for 1979-1988 GMC P3500 6.2L 7.4L V8Special Price $9.78 Regular Price $13.99
- Walker Int Pipe Left Exhaust System Hanger for 1975-1988 Chevrolet P30 6.2L 7.4L V8Special Price $9.78 Regular Price $13.99
- Walker Int Pipe Left Exhaust System Insulator for 1996-2000 Chevrolet K3500 5.7L 7.4L V8Special Price $9.87 Regular Price $13.99