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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- 2 pc Walker Y-Pipe Inlets Exhaust Bolt & Springs for 1988-1995 GMC K3500 5.7L 6.2L V8Special Price $32.06 Regular Price $45.99
- 2 pc Walker Y-Pipe Inlets Exhaust Bolt & Springs for 1988-1995 Chevrolet K2500 4.3L 5.0L 5.7L 6.2L V6 V8Special Price $32.06 Regular Price $45.99
- 2 pc Walker Y-Pipe Inlets Exhaust Bolt & Springs for 1992-1994 Chevrolet Blazer 5.7L V8Special Price $32.06 Regular Price $45.99
- 2 pc Walker Y-Pipe Inlets Exhaust Bolt & Springs for 1991 GMC R3500 5.7L V8Special Price $32.06 Regular Price $45.99
- 2 pc Walker Y-Pipe Inlets Exhaust Bolt & Springs for 1988-1990 GMC S15 4.3L V6Special Price $32.06 Regular Price $45.99
- 2 pc Walker Y-Pipe Inlets Exhaust Bolt & Springs for 1991 GMC V3500 5.7L V8Special Price $32.06 Regular Price $45.99
- 2 pc Walker Y-Pipe Inlets Exhaust Bolt & Springs for 1991 Chevrolet R3500 5.7L V8Special Price $32.06 Regular Price $45.99
- 2 pc Walker Y-Pipe Inlets Exhaust Bolt & Springs for 1988-1995 Chevrolet C2500 4.3L 5.0L 5.7L 6.2L V6 V8Special Price $32.06 Regular Price $45.99
- 2 pc Walker Y-Pipe Inlets Exhaust Bolt & Springs for 1992-1993 GMC K1500 Suburban 5.7L V8Special Price $32.06 Regular Price $45.99
- 2 pc Walker Y-Pipe Inlets Exhaust Bolt & Springs for 1992-1993 Chevrolet K1500 Suburban 5.7L V8Special Price $32.06 Regular Price $45.99
- 2 pc Walker Y-Pipe Inlets Exhaust Bolt & Springs for 1991-1994 Oldsmobile Bravada 4.3L V6Special Price $32.06 Regular Price $45.99
- 2 pc Walker Y-Pipe Inlets Exhaust Bolt & Springs for 1992-1994 GMC Jimmy 4.3L V6Special Price $32.06 Regular Price $45.99
- 2 pc Walker Y-Pipe Inlets Exhaust Bolt & Springs for 1988-1993 Chevrolet C1500 4.3L 5.0L 5.7L 6.2L V6 V8Special Price $32.06 Regular Price $45.99
- 2 pc Walker Y-Pipe Inlets Exhaust Pipe Flange Gaskets for 1992-1993 GMC C1500 Suburban 5.7L V8Special Price $32.66 Regular Price $46.99
- 2 pc Walker Y-Pipe Inlets Exhaust Pipe Flange Gaskets for 1988-1995 GMC K2500 4.3L 5.0L 5.7L 6.2L V6 V8Special Price $32.66 Regular Price $46.99
- 2 pc Walker Y-Pipe Inlets Exhaust Pipe Flange Gaskets for 1988-1994 Chevrolet S10 4.3L V6Special Price $32.66 Regular Price $46.99
- 2 pc Walker Y-Pipe Inlets Exhaust Pipe Flange Gaskets for 1992-1996 GMC G3500 4.3L 5.7L V6 V8Special Price $32.66 Regular Price $46.99
- 2 pc Walker Y-Pipe Inlets Exhaust Pipe Flange Gaskets for 1988-1995 Chevrolet K3500 5.7L 6.2L V8Special Price $32.66 Regular Price $46.99
- 2 pc Walker Y-Pipe Inlets Exhaust Pipe Flange Gaskets for 1992-1993 Chevrolet C1500 Suburban 5.7L V8Special Price $32.66 Regular Price $46.99
- 2 pc Walker Y-Pipe Inlets Exhaust Pipe Flange Gaskets for 1992-1994 GMC Jimmy 4.3L V6Special Price $32.66 Regular Price $46.99
- 2 pc Walker Y-Pipe Inlets Exhaust Pipe Flange Gaskets for 1992-1993 Chevrolet K1500 Suburban 5.7L V8Special Price $32.66 Regular Price $46.99
- 2 pc Walker Y-Pipe Inlets Exhaust Pipe Flange Gaskets for 1992-1993 GMC K1500 Suburban 5.7L V8Special Price $32.66 Regular Price $46.99
- 2 pc Walker Y-Pipe Inlets Exhaust Pipe Flange Gaskets for 1988-1995 GMC C2500 4.3L 5.0L 5.7L 6.2L V6 V8Special Price $32.66 Regular Price $46.99
- 2 pc Walker Y-Pipe Inlets Exhaust Pipe Flange Gaskets for 1991 GMC R3500 5.7L V8Special Price $32.66 Regular Price $46.99
- 2 pc Walker Y-Pipe Inlets Exhaust Pipe Flange Gaskets for 1992-1995 Chevrolet C2500 Suburban 5.7L V8Special Price $32.66 Regular Price $46.99
- 2 pc Walker Y-Pipe Inlets Exhaust Pipe Flange Gaskets for 1987-1996 Chevrolet P30 4.3L 5.7L V6 V8Special Price $32.66 Regular Price $46.99
- 2 pc Walker Y-Pipe Inlets Exhaust Pipe Flange Gaskets for 1992-1995 Chevrolet K2500 Suburban 5.7L V8Special Price $32.66 Regular Price $46.99
- 2 pc Walker Y-Pipe Inlets Exhaust Pipe Flange Gaskets for 1992-1995 GMC K2500 Suburban 5.7L V8Special Price $32.66 Regular Price $46.99
- 2 pc Walker Y-Pipe Inlets Exhaust Pipe Flange Gaskets for 1988-1995 Chevrolet C3500 5.7L 6.2L V8Special Price $32.66 Regular Price $46.99
- 2 pc Walker Y-Pipe Inlets Exhaust Pipe Flange Gaskets for 1991-1994 Oldsmobile Bravada 4.3L V6Special Price $32.66 Regular Price $46.99
- 2 pc Walker Y-Pipe Inlets Exhaust Bolt & Springs for 1988-1993 GMC K1500 4.3L 5.0L 5.7L 6.2L V6 V8Special Price $32.72 Regular Price $46.99
- 2 pc Walker Y-Pipe Inlets Exhaust Bolt & Springs for 1992-1995 Chevrolet K2500 Suburban 5.7L V8Special Price $32.72 Regular Price $46.99
- 2 pc Walker Y-Pipe Inlets Exhaust Bolt & Springs for 1988-1991 GMC S15 Jimmy 4.3L V6Special Price $32.72 Regular Price $46.99
- 2 pc Walker Y-Pipe Inlets Exhaust Bolt & Springs for 1988-1995 GMC C3500 5.7L 6.2L V8Special Price $32.72 Regular Price $46.99
- 2 pc Walker Y-Pipe Inlets Exhaust Bolt & Springs for 1988-1994 Chevrolet S10 4.3L V6Special Price $32.72 Regular Price $46.99
- 2 pc Walker Y-Pipe Inlets Exhaust Bolt & Springs for 1992-1993 Chevrolet C1500 Suburban 5.7L V8Special Price $32.72 Regular Price $46.99
- 2 pc Walker Y-Pipe Inlets Exhaust Bolt & Springs for 1988-1994 Chevrolet S10 Blazer 4.3L V6Special Price $32.72 Regular Price $46.99
- 2 pc Walker Y-Pipe Inlets Exhaust Bolt & Springs for 1990-1994 Chevrolet C35 5.7L V8Special Price $32.72 Regular Price $46.99
- 2 pc Walker Y-Pipe Inlets Exhaust Bolt & Springs for 1988-1995 GMC K2500 4.3L 5.0L 5.7L 6.2L V6 V8Special Price $32.72 Regular Price $46.99
- 2 pc Walker Y-Pipe Inlets Exhaust Bolt & Springs for 1988-1993 Chevrolet K1500 4.3L 5.0L 5.7L 6.2L V6 V8Special Price $32.72 Regular Price $46.99
- 2 pc Walker Y-Pipe Inlets Exhaust Bolt & Springs for 1992-1995 GMC C2500 Suburban 5.7L V8Special Price $32.72 Regular Price $46.99
- 2 pc Walker Y-Pipe Inlets Exhaust Bolt & Springs for 1988-1995 Chevrolet K3500 5.7L 6.2L V8Special Price $32.72 Regular Price $46.99
- 2 pc Walker Y-Pipe Inlets Exhaust Bolt & Springs for 1992-1995 Chevrolet C2500 Suburban 5.7L V8Special Price $32.72 Regular Price $46.99
- 2 pc Walker Y-Pipe Inlets Exhaust Bolt & Springs for 1988-1995 Chevrolet C3500 5.7L 6.2L V8Special Price $32.72 Regular Price $46.99
- 2 pc Walker Y-Pipe Inlets Exhaust Pipe Flange Gaskets for 1988-1995 GMC C3500 5.7L 6.2L V8Special Price $33.50 Regular Price $47.99
- 2 pc Walker Y-Pipe Inlets Exhaust Pipe Flange Gaskets for 1988-1994 Chevrolet S10 Blazer 4.3L V6Special Price $33.50 Regular Price $47.99
- 2 pc Walker Y-Pipe Inlets Exhaust Pipe Flange Gaskets for 1989-1991 Chevrolet V3500 5.7L 7.4L V8Special Price $33.50 Regular Price $47.99