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 Muffler Exhaust System Insulator for 1998-2002 Ford E-150 Econoline Club Wagon 5.4L V8Special Price $9.51 Regular Price $13.99
- Walker Muffler Exhaust System Insulator for 1999-2000 Cadillac Escalade 5.7L V8Special Price $9.51 Regular Price $13.99
- Walker Muffler Exhaust System Insulator for 1996-1999 Chevrolet C2500 Suburban 5.7L V8Special Price $9.51 Regular Price $13.99
- Walker Muffler Exhaust System Insulator for 2003-2010 Chevrolet Express 3500 4.8L 6.0L V8Special Price $9.51 Regular Price $13.99
- Walker Muffler Exhaust System Insulator for 1996-1999 Chevrolet C1500 Suburban 5.7L V8Special Price $9.51 Regular Price $13.99
- Walker Muffler Exhaust System Insulator for 1994-1997 Oldsmobile Cutlass Supreme 3.1L V6Special Price $9.51 Regular Price $13.99
- Walker Muffler Exhaust System Insulator for 1990-1995 Chevrolet C3500 5.7L 6.2L V8Special Price $9.51 Regular Price $13.99
- Walker Muffler Exhaust System Insulator for 1990-1995 GMC C3500 5.7L 6.2L V8Special Price $9.51 Regular Price $13.99
- Walker Muffler Exhaust System Insulator for 1991-1996 GMC G3500 7.4L V8Special Price $9.51 Regular Price $13.99
- Walker Muffler Exhaust System Insulator for 1995 Chevrolet G20 4.3L 5.0L 5.7L V6 V8Special Price $9.51 Regular Price $13.99
- Walker Muffler Exhaust System Insulator for 1999-2006 Ford Econoline 5.4L V8Special Price $9.51 Regular Price $13.99
- Walker Muffler Exhaust System Insulator for 2002-2007 Ford E-150 5.4L V8Special Price $9.51 Regular Price $13.99
- Walker Muffler Exhaust System Insulator for 1996-2000 GMC Yukon 5.7L V8Special Price $9.51 Regular Price $13.99
- Walker Muffler Exhaust System Insulator for 1994-1995 Buick Regal 3.1L V6Special Price $9.51 Regular Price $13.99
- Walker Muffler Exhaust System Insulator for 1996-1999 GMC K2500 Suburban 5.7L V8Special Price $9.51 Regular Price $13.99
- Walker Muffler Exhaust System Insulator for 1996-1999 GMC C2500 Suburban 5.7L V8Special Price $9.51 Regular Price $13.99
- Walker Muffler Exhaust System Insulator for 1997-2002 Ford E-250 Econoline 5.4L V8Special Price $9.87 Regular Price $13.99
- Walker Muffler Exhaust System Insulator for 2004 Ford E-350 Club Wagon 5.4L V8Special Price $9.87 Regular Price $13.99
- Walker Muffler Exhaust System Insulator for 2014-2019 Kia Soul 1.6L L4Special Price $9.87 Regular Price $13.99
- Walker Muffler Exhaust System Insulator for 1996-1999 GMC K1500 Suburban 5.7L V8Special Price $9.87 Regular Price $13.99
- Walker Muffler Exhaust System Insulator for 1995 Chevrolet G10 4.3L 5.0L V6 V8Special Price $9.87 Regular Price $13.99
- Walker Muffler Exhaust System Insulator for 2004 Ford E-350 Super Duty 5.4L V8Special Price $9.87 Regular Price $13.99
- Walker Muffler Exhaust System Insulator for 2003-2009 Chevrolet Express 2500 4.8L 6.0L V8Special Price $9.87 Regular Price $13.99
- Walker Muffler Exhaust System Insulator for 1994-1999 Oldsmobile Cutlass 3.1L V6Special Price $9.87 Regular Price $13.99
- Walker Muffler Exhaust System Insulator for 1990-1994 Chevrolet C35 5.7L V8Special Price $9.87 Regular Price $13.99
- Walker Muffler Exhaust System Insulator for 2003-2010 GMC Savana 3500 4.8L 6.0L V8Special Price $9.87 Regular Price $13.99
- Walker Muffler Exhaust System Insulator for 2007-2012 Chevrolet Colorado 2.9L 3.7L L4 L5Special Price $9.87 Regular Price $13.99
- Walker Muffler Exhaust System Insulator for 1990-1995 Chevrolet K3500 5.7L 6.2L V8Special Price $9.87 Regular Price $13.99
- Walker Muffler Exhaust System Insulator for 1996-2000 Chevrolet Tahoe 5.7L V8Special Price $9.87 Regular Price $13.99
- Walker Muffler Exhaust System Hanger for 1988-1989 GMC V3500 6.2L V8Special Price $10.15 Regular Price $13.99
- Walker Muffler Exhaust System Hanger for 1988 Chevrolet V30 6.2L V8Special Price $10.15 Regular Price $13.99
- 2 pc Walker Muffler Exhaust System Insulators for 1993-1997 Geo Prizm 1.6L 1.8L L4Special Price $10.91 Regular Price $15.99
- 2 pc Walker Muffler Exhaust System Insulators for 1995-1998 Mazda Protege 1.5L L4Special Price $10.91 Regular Price $15.99
- 2 pc Walker Muffler Exhaust System Insulators for 1986-1988 Nissan Stanza 2.0L L4Special Price $10.91 Regular Price $15.99
- 2 pc Walker Muffler Exhaust System Insulators for 2013-2016 Hyundai Santa Fe Sport 2.4L L4Special Price $10.91 Regular Price $15.99
- 2 pc Walker Muffler Exhaust System Insulators for 2006 Pontiac Pursuit 2.2L 2.4L L4Special Price $10.91 Regular Price $15.99
- 2 pc Walker Muffler Exhaust System Insulators for 1997-2001 Toyota Camry 2.2L 3.0L L4 V6Special Price $10.91 Regular Price $15.99
- 2 pc Walker Muffler Exhaust System Insulators for 2004-2008 Chevrolet Malibu 2.2L 3.5L L4 V6Special Price $10.91 Regular Price $15.99
- 2 pc Walker Muffler Exhaust System Insulators for 2003-2013 Toyota Matrix 1.8L L4Special Price $11.30 Regular Price $15.99