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 Tail Pipe Left Exhaust System Hanger for 1975-1978 GMC C35 7.4L V8Special Price $9.78 Regular Price $13.99
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- 2 pc Walker H-Pipe To Muffler Exhaust Clamps for 1996-1999 GMC K1500 5.7L V8Special Price $8.35 Regular Price $11.99
- 2 pc Walker H-Pipe To Muffler Exhaust Clamps for 1996-1999 GMC C1500 5.7L V8Special Price $8.35 Regular Price $11.99
- 2 pc Walker H-Pipe To Muffler Exhaust Clamps for 1996-1999 Chevrolet C1500 5.7L V8Special Price $8.35 Regular Price $11.99
- 2 pc Walker H-Pipe To Muffler Exhaust Clamps for 1996-1998 Chevrolet C2500 5.7L V8Special Price $8.69 Regular Price $11.99
- 2 pc Walker H-Pipe To Muffler Exhaust Clamps for 1996-1998 GMC C2500 5.7L V8Special Price $8.69 Regular Price $11.99
- 2 pc Walker H-Pipe To Muffler Exhaust Clamps for 1996-2000 Chevrolet Tahoe 5.7L V8Special Price $8.69 Regular Price $11.99
- 2 pc Walker H-Pipe To Muffler Exhaust Clamps for 1996-2000 GMC Yukon 5.7L V8Special Price $8.69 Regular Price $11.99
- Walker Tail Pipe Left Exhaust System Hanger for 1982-1988 GMC P3500 5.7L 6.2L V8Special Price $9.78 Regular Price $13.99
- Walker Tail Pipe Left Exhaust System Hanger for 1975-1985 Chevrolet C30 7.4L V8Special Price $10.15 Regular Price $13.99
- 2 pc Walker H-Pipe To Muffler Exhaust Clamps for 1969-1970 Mercury Monterey 7.0L V8Special Price $14.21 Regular Price $19.99