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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MAHLE EGR Valve Gasket for 1992-2013 GMC C1500 C2500 C3500 G1500 G2500 G3500 Jimmy K1500 K2500 K3500 P350 2.2L 4.3L 5.0L 5.7L L4 V6 V8Special Price $9.58 Regular Price $13.99 -
Fel-Pro Exhaust Manifold Gasket Set for 1975-1978 GMC K15 5.0L 5.7L 6.6L V8Special Price $16.48 Regular Price $23.99 -
Fel-Pro Exhaust Manifold Gasket Set for 1999-2013 GMC Sierra 1500 4.3L V6Special Price $25.18 Regular Price $35.99 -
MAHLE Exhaust Manifold Gasket Set for 1982-2002 GMC B7 C1500 C2500 C3500 C3500HD G2500 Suburban 6.2L 6.5L V8Special Price $35.49 Regular Price $50.99 -
Walker Y-Pipe To Converter Exhaust Clamp for 1988-1993 GMC C1500 5.7L V8Special Price $12.78 Regular Price $17.99 -
Walker Front Y-Pipe To Rear Converter Exhaust Pipe Flange Gasket for 2009-2016 GMC Acadia 3.6L V6Special Price $18.37 Regular Price $25.99 -
Walker Converter Inlet Left Exhaust Pipe Flange Gasket for 2000-2014 GMC Yukon XL 1500 5.3L 6.0L 6.2L V8Special Price $20.54 Regular Price $28.99 -
Fel-Pro EGR Valve Gasket for 1988-1995 GMC C1500 4.3L 5.0L 5.7L V6 V8Special Price $9.07 Regular Price $12.99 -
Walker Muffler Left To Tail Pipe Left Exhaust Clamp for 1982-1988 GMC P2500 6.2L V8Special Price $9.21 Regular Price $12.99Out of stock -
Fel-Pro EGR Valve Gasket for 1985-1994 GMC Safari 2.5L 4.3L L4 V6Special Price $9.26 Regular Price $12.99 -
Fel-Pro EGR Valve Gasket for 1987-1991 GMC R1500 Suburban 5.0L 5.7L V8Special Price $9.26 Regular Price $12.99 -
Fel-Pro EGR Valve Gasket for 2000-2014 GMC Yukon XL 1500 5.3L 6.0L 6.2L V8Special Price $9.27 Regular Price $12.99 -
Walker Exhaust Clamp for 1975-1978 GMC G35 4.1L 5.7L L6 V8Special Price $9.40 Regular Price $12.99Out of stock -
Fel-Pro EGR Valve Gasket for 1985-1986 GMC C2500 Suburban 7.4L V8Special Price $10.18 Regular Price $14.99 -
Walker Exhaust Clamp for 1967-1972 GMC C15 C1500 Pickup 3.8L 4.1L 4.6L 4.8L 5.0L 5.3L L6 V6 V8Special Price $10.36 Regular Price $14.99 -
MAHLE EGR Valve Gasket for 1999-2013 GMC 1500 2500 3 Canyon Envoy Savana XL XUV 4.8L 5.3L 6.0L 6.2L V8Special Price $10.40 Regular Price $14.99 -
Walker Y-Pipe To Int Pipe Front Exhaust Clamp for 1982-1987 GMC P2500 5.7L V8Special Price $10.60 Regular Price $14.99 -
2 pc Walker Tail Pipe Exhaust Clamps for 1984-1986 GMC K2500 Suburban 6.2L V8Special Price $11.05 Regular Price $15.99Out of stock -
2 pc Walker Muffler To Tail Pipe Exhaust Clamps for 1982-1986 GMC C1500 Suburban 6.2L V8Special Price $11.05 Regular Price $15.99Out of stock -
Fel-Pro Exhaust Pipe Flange Gasket for 1960-1966 GMC 3000 3.8L 4.1L 4.3L 4.6L 4.8L 5.0L L6 V6 V8Special Price $11.23 Regular Price $15.99 -
Fel-Pro Exhaust Pipe Flange Gasket for 1965-1967 GMC L3500 5.0L V6Special Price $11.23 Regular Price $15.99 -
Fel-Pro Exhaust Pipe Flange Gasket for 1996-2000 GMC K3500 5.7L V8Special Price $12.46 Regular Price $17.99 -
Fel-Pro Exhaust Pipe Flange Gasket for 1996-1999 GMC K1500 Suburban 5.7L V8Special Price $12.46 Regular Price $17.99 -
Walker Muffler To Tail Pipe Exhaust Clamp for 1999-2013 GMC Sierra 1500 4.3L 4.8L 5.3L 6.0L V6 V8Special Price $12.64 Regular Price $17.99 -
Walker Muffler To Resonator Assm Exhaust Clamp for 2015-2019 GMC Yukon XL 5.3L V8Special Price $12.64 Regular Price $17.99 -
Fel-Pro Left Exhaust Pipe Flange Gasket for 2007 GMC Sierra 1500 Classic 4.3L 4.8L 5.3L V6 V8Special Price $13.62 Regular Price $18.99 -
Fel-Pro Left Exhaust Pipe Flange Gasket for 2004 GMC Envoy XL 5.3L V8Special Price $13.62 Regular Price $18.99 -
Walker Extension Pipe To Muffler Exhaust Clamp for 2007-2017 GMC Sierra 2500 HD 6.0L V8Special Price $13.64 Regular Price $18.99 -
Fel-Pro Exhaust Pipe Flange Gasket for 2007 GMC Sierra 3500 Classic 6.6L V8Special Price $13.66 Regular Price $19.99 -
Fel-Pro Exhaust Pipe Flange Gasket for 2001-2006 GMC Sierra 3500 6.0L 8.1L V8Special Price $14.37 Regular Price $20.99 -
Walker Converter Right Exhaust System Insulator for 2007 GMC Sierra 3500 Classic 6.0L 8.1L V8Special Price $14.97 Regular Price $20.99 -
Fel-Pro Exhaust Pipe Flange Gasket for 1979-1986 GMC K1500 4.8L 5.0L 5.7L 6.6L L6 V8Special Price $15.82 Regular Price $22.99 -
Fel-Pro Exhaust Manifold Gasket Set for 1987-1991 GMC R3500 5.7L V8Special Price $16.48 Regular Price $23.99 -
Walker Converter To Int Pipe Exhaust Pipe Flange Gasket for 1996-1999 GMC K1500 4.3L 5.0L V6 V8Special Price $17.01 Regular Price $23.99 -
Walker Exhaust System Hanger for 1975-1978 GMC G15 4.1L 5.0L 5.7L L6 V8Special Price $18.25 Regular Price $25.99 -
Walker Exhaust System Hanger for 1975-1978 GMC G35 4.8L 5.7L L6 V8Special Price $18.25 Regular Price $25.99 -
Fel-Pro Exhaust Pipe Flange Gasket for 1982-1998 GMC K1500 4.3L 6.2L 6.5L V6 V8Special Price $19.40 Regular Price $27.99 -
2 pc Walker Tail Pipe Exhaust System Insulators for 1991-1996 GMC G3500 7.4L V8Special Price $22.57 Regular Price $31.99 -
Fel-Pro Exhaust Manifold Gasket Set for 1996-1999 GMC C1500 5.0L 5.7L V8Special Price $27.12 Regular Price $38.99 -
Fel-Pro Exhaust Manifold Gasket Set for 2003-2016 GMC Savana 2500 4.8L 5.3L 6.0L V8Special Price $29.08 Regular Price $41.99 -
2 pc Walker Exhaust Muffler Straps for 1987 GMC V1500 5.7L V8Special Price $29.90 Regular Price $42.99 -
Fel-Pro Exhaust Manifold Gasket Set for 1996-2000 GMC K3500 7.4L V8Special Price $31.56 Regular Price $44.99 -
2 pc Walker Exhaust Pipe Flange Gaskets for 1987 GMC V2500 5.7L V8Special Price $32.91 Regular Price $46.99Out of stock -
2 pc Walker Y-Pipe Inlets Exhaust Pipe Flange Gaskets for 1987-1988 GMC P3500 5.7L V8Special Price $33.58 Regular Price $47.99Out of stock -
MAHLE Exhaust Manifold Gasket Set for 2014-2019 GMC 1500 Limited Sierra XL Yukon 5.3L 6.2L V8Special Price $40.22 Regular Price $56.99 -
Fel-Pro Exhaust Manifold Hardware Kit for 2007 GMC Sierra 2500 HD Classic 6.0L V8Special Price $43.98 Regular Price $62.99 -
Fel-Pro Exhaust Manifold Hardware Kit for 1992-1999 GMC C2500 Suburban 5.7L V8Special Price $52.76 Regular Price $74.99


































































