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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Fel-Pro Exhaust Pipe Flange Gasket for 1996-2010 Toyota 4Runner 2.7L 3.4L L4 V6Special Price $11.59 Regular Price $16.99 -
Fel-Pro Exhaust Pipe Flange Gasket for 1996-2000 Toyota 4Runner 3.4L V6Special Price $11.15 Regular Price $15.99 -
Fel-Pro EGR Valve Gasket for 1984-1995 Toyota 4Runner 2.4L L4Special Price $13.41 Regular Price $18.99 -
Walker Muffler Assm To Tail Pipe Exhaust Pipe Flange Gasket for 1996-2017 Toyota 4Runner 2.7L 3.4L 4.0L 4.7L L4 V6 V8Special Price $14.42 Regular Price $20.99 -
Walker Rear Converter To Muffler Assm Exhaust Pipe Flange Gasket for 1999-2002 Toyota 4Runner 2.7L 3.4L L4 V6Special Price $14.72 Regular Price $20.99 -
Walker Tail Pipe Exhaust System Insulator for 2003-2017 Toyota 4Runner 4.0L 4.7L V6 V8Special Price $17.43 Regular Price $24.99 -
4 pc Walker Muffler Assm Exhaust System Insulators for 2003-2017 Toyota 4Runner 4.0L 4.7L V6 V8Special Price $24.32 Regular Price $34.99 -
Fel-Pro EGR Valve Gasket for 1996-2000 Toyota 4Runner 2.7L L4Special Price $10.21 Regular Price $14.99 -
Walker Converter Right To Rear Exhaust Pipe Flange Gasket for 2003-2004 Toyota 4Runner 4.7L V8Special Price $10.42 Regular Price $14.99Out of stock -
Walker Converter Front Right To Rear Right Exhaust Pipe Flange Gasket for 2003-2017 Toyota 4Runner 4.0L 4.7L V6 V8Special Price $10.42 Regular Price $14.99Out of stock -
Walker Converter Rear Left To Rear Right Exhaust Pipe Flange Gasket for 2003-2017 Toyota 4Runner 4.0L 4.7L V6 V8Special Price $10.42 Regular Price $14.99Out of stock -
Walker Left Converter To Front Pipe Exhaust Pipe Flange Gasket for 2003-2004 Toyota 4Runner 4.7L V8Special Price $10.42 Regular Price $14.99Out of stock -
Walker Converter Front Left To Rear Left Exhaust Pipe Flange Gasket for 2003-2017 Toyota 4Runner 4.0L V6Special Price $10.64 Regular Price $14.99Out of stock -
Walker Exhaust Pipe Flange Gasket for 1988-1995 Toyota 4Runner 3.0L V6Special Price $10.64 Regular Price $14.99Out of stock -
Walker Front Pipe To Rear Converter Exhaust Pipe Flange Gasket for 2003-2004 Toyota 4Runner 4.7L V8Special Price $10.64 Regular Price $14.99Out of stock -
Fel-Pro Front Exhaust Pipe Flange Gasket for 1984-1995 Toyota 4Runner 2.4L 3.0L L4 V6Special Price $10.78 Regular Price $14.99 -
Fel-Pro Rear Exhaust Pipe Flange Gasket for 1984-1995 Toyota 4Runner 2.4L 3.0L L4 V6Special Price $10.92 Regular Price $15.99 -
Fel-Pro Exhaust Pipe Flange Gasket for 1988-1995 Toyota 4Runner 2.4L 3.0L L4 V6Special Price $11.01 Regular Price $15.99 -
Fel-Pro Front Exhaust Pipe Flange Gasket for 2003-2009 Toyota 4Runner 4.7L V8Special Price $11.15 Regular Price $15.99 -
Fel-Pro Exhaust Pipe Flange Gasket for 1984-1995 Toyota 4Runner 2.4L L4Special Price $11.19 Regular Price $15.99 -
Fel-Pro Exhaust Pipe Flange Gasket for 1988-2000 Toyota 4Runner 2.7L 3.0L L4 V6Special Price $11.21 Regular Price $15.99 -
Fel-Pro Exhaust Pipe Flange Gasket for 1985-1988 Toyota 4Runner 2.4L L4Special Price $11.21 Regular Price $15.99 -
Fel-Pro Exhaust Pipe Flange Gasket for 1996-2000 Toyota 4Runner 2.7L L4Special Price $11.35 Regular Price $15.99 -
Fel-Pro Front Exhaust Pipe Flange Gasket for 1984-1995 Toyota 4Runner 2.4L L4Special Price $11.36 Regular Price $15.99 -
Walker Converter Rear Right Exhaust System Insulator for 2005-2009 Toyota 4Runner 4.7L V8Special Price $11.48 Regular Price $15.99 -
2 pc Walker Exhaust Pipe Flange Gaskets for 1985-1995 Toyota 4Runner 2.4L L4Special Price $12.05 Regular Price $16.99Out of stock -
Walker Exhaust Pipe Flange Gasket for 1985-1995 Toyota 4Runner 2.4L L4Special Price $12.21 Regular Price $16.99Out of stock -
Fel-Pro Exhaust Pipe Flange Gasket for 1996-2015 Toyota 4Runner 2.7L 3.4L 4.0L L4 V6Special Price $12.31 Regular Price $17.99 -
Fel-Pro Rear Exhaust Pipe Flange Gasket for 2003-2015 Toyota 4Runner 4.0L V6Special Price $12.31 Regular Price $17.99 -
Fel-Pro Exhaust Pipe Flange Gasket for 1996-2015 Toyota 4Runner 3.4L 4.0L 4.7L V6 V8Special Price $12.56 Regular Price $17.99 -
Fel-Pro Center Exhaust Pipe Flange Gasket for 2003-2015 Toyota 4Runner 4.0L 4.7L V6 V8Special Price $12.56 Regular Price $17.99 -
Walker Converter To Muffler Assm Exhaust Pipe Flange Gasket for 1996-2000 Toyota 4Runner 2.7L L4Special Price $12.62 Regular Price $17.99Out of stock -
Walker Exhaust Pipe Flange Gasket for 1988-1995 Toyota 4Runner 3.0L V6Special Price $12.62 Regular Price $17.99Out of stock -
Walker Front Converter To Rear Converter Exhaust Pipe Flange Gasket for 1999-2002 Toyota 4Runner 2.7L 3.4L L4 V6Special Price $12.62 Regular Price $17.99Out of stock -
Fel-Pro Front Exhaust Pipe Flange Gasket for 2003-2009 Toyota 4Runner 4.7L V8Special Price $13.15 Regular Price $18.99 -
Fel-Pro Exhaust Pipe Flange Gasket for 1996-2009 Toyota 4Runner 3.4L 4.0L V6Special Price $13.42 Regular Price $18.99 -
2 pc Walker Front Pipe To Converter Exhaust Pipe Flange Gaskets for 1996-2000 Toyota 4Runner 3.4L V6Special Price $13.48 Regular Price $18.99Out of stock -
2 pc Walker Converter Inlet Exhaust Pipe Flange Gaskets for 1996-2000 Toyota 4Runner 2.7L L4Special Price $13.76 Regular Price $19.99Out of stock -
2 pc Walker Converter Front Left To Rear Left Exhaust Pipe Flange Gaskets for 2005-2009 Toyota 4Runner 4.7L V8Special Price $13.76 Regular Price $19.99Out of stock -
Walker Muffler Assm To Resonator Assm Exhaust Pipe Flange Gasket for 2003-2009 Toyota 4Runner 4.0L V6Special Price $14.72 Regular Price $20.99 -
Walker Converter To Muffler Assm Exhaust Pipe Flange Gasket for 1996-2000 Toyota 4Runner 3.4L V6Special Price $14.72 Regular Price $20.99 -
2 pc Walker Muffler Assm Exhaust System Insulators for 1996-2002 Toyota 4Runner 2.7L 3.4L L4 V6Special Price $15.60 Regular Price $21.99 -
Walker Converter Rear Right To Muffler Assm Exhaust Pipe Flange Gasket for 2003-2017 Toyota 4Runner 4.0L 4.7L V6 V8Special Price $15.80 Regular Price $22.99Out of stock -
Walker Rear Converter To Muffler Assm Exhaust Pipe Flange Gasket for 2003-2004 Toyota 4Runner 4.7L V8Special Price $16.13 Regular Price $22.99Out of stock -
Walker Resonator Assm Exhaust System Insulator for 2003-2009 Toyota 4Runner 4.0L V6Special Price $17.08 Regular Price $23.99 -
Fel-Pro Exhaust Manifold Gasket Set for 2003-2009 Toyota 4Runner 4.0L V6Special Price $18.85 Regular Price $26.99

































































