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 Exhaust Manifold Gasket Set for 2006-2018 Lexus ES350 GS300 GS350 GS450h IS250 IS300 IS350 RC300 RC350 RX350 RX4 2.5L 3.0L 3.5L V6Special Price $30.10 Regular Price $42.99
- MAHLE Exhaust Pipe Flange Gasket for 1998-2016 Lexus ES350 GS300 GS400 GS430 IS300 LS400 RX350 RX450h SC400 SC430 3.0L 3.5L 4.0L 4.3L L6 V6 V8Special Price $11.41 Regular Price $15.99
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- Walker Muffler Left Exhaust System Insulator for 1990-1994 Lexus LS400 4.0L V8Special Price $9.76 Regular Price $13.99
- Walker Muffler Right Exhaust System Insulator for 1990-1994 Lexus LS400 4.0L V8Special Price $9.96 Regular Price $13.99
- Walker Converter Inlet Front Exhaust Pipe Flange Gasket for 1999-2003 Lexus RX300 3.0L V6Special Price $10.83 Regular Price $14.99
- Walker Converter Right To Rear Exhaust Pipe Flange Gasket for 2007-2017 Lexus ES350 3.5L V6Special Price $10.83 Regular Price $14.99
- Fel-Pro Exhaust Pipe Flange Gasket for 2007-2015 Lexus RX350 3.5L V6Special Price $11.57 Regular Price $16.99
- Fel-Pro Front Exhaust Pipe Flange Gasket for 2007-2015 Lexus GS350 3.5L V6Special Price $14.04 Regular Price $19.99
- 2 pc Walker Exhaust System Insulators for 1994-1996 Lexus ES300 3.0L V6Special Price $16.39 Regular Price $22.99
- MAHLE Exhaust Pipe Flange Gasket for 2002-2003 Lexus RX300 3.0L V6Special Price $19.73 Regular Price $27.99
- Walker Rear Converter To Muffler Assm Exhaust Bolt & Spring for 2003-2004 Lexus GX470 4.7L V8Special Price $22.28 Regular Price $31.99
- Walker Resonator Assm To Muffler Assm Exhaust Pipe Flange Gasket for 2001-2005 Lexus IS300 3.0L L6Special Price $23.62 Regular Price $33.99
- Fel-Pro Exhaust Flange Stud & Nut for 1992-2003 Lexus ES300 3.0L V6Special Price $26.78 Regular Price $37.99
- Fel-Pro Exhaust Flange Stud & Nut for 2001-2007 Lexus GS430 4.3L V8Special Price $27.33 Regular Price $38.99
- Fel-Pro EGR Valve Gasket for 1999-2003 Lexus RX300 3.0L V6Special Price $9.56 Regular Price $13.99 Out of stock
- Fel-Pro EGR Valve Gasket for 1994-2003 Lexus ES300 3.0L V6Special Price $9.56 Regular Price $13.99 Out of stock
- Walker Y-Pipe To Left Muffler Assm Exhaust Clamp for 1990-1994 Lexus LS400 4.0L V8Special Price $10.03 Regular Price $13.99
- Walker Muffler Assm Left To Int Pipe Left Exhaust Clamp for 1990-1994 Lexus LS400 4.0L V8Special Price $10.03 Regular Price $13.99
- Walker Y-Pipe To Right Muffler Assm Exhaust Clamp for 1990-1994 Lexus LS400 4.0L V8Special Price $10.24 Regular Price $14.99
- Walker Muffler Assm Right To Int Pipe Right Exhaust Clamp for 1990-1994 Lexus LS400 4.0L V8Special Price $10.24 Regular Price $14.99
- Walker Left Extension Pipe To Left Muffler Exhaust Clamp for 1990-1994 Lexus LS400 4.0L V8Special Price $10.24 Regular Price $14.99
- Walker Right Extension Pipe To Right Muffler Exhaust Clamp for 1990-1994 Lexus LS400 4.0L V8Special Price $10.24 Regular Price $14.99
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- Walker Converter Rear To Muffler Assm Exhaust Clamp for 2007-2009 Lexus RX350 3.5L V6Special Price $10.41 Regular Price $14.99
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- MAHLE Exhaust Pipe Flange Gasket for 2010-2016 Lexus ES350 HS250h RX450h 2.4L 3.5L L4 V6Special Price $10.56 Regular Price $14.99
- Walker Right Converter To Y-Pipe Exhaust Pipe Flange Gasket for 2006-2008 Lexus RX400h 3.3L V6Special Price $10.61 Regular Price $14.99
- Walker Converter Front Right To Rear Right Exhaust Pipe Flange Gasket for 2010-2017 Lexus GX460 4.6L V8Special Price $10.61 Regular Price $14.99
- Walker Left Exhaust Pipe Flange Gasket for 1998-2007 Lexus LX470 4.7L V8Special Price $10.61 Regular Price $14.99
- Walker Converter Center To Y-Pipe Exhaust Pipe Flange Gasket for 2007-2009 Lexus RX350 3.5L V6Special Price $10.61 Regular Price $14.99
- Walker Front Pipe To Y-Pipe Exhaust Pipe Flange Gasket for 2006-2008 Lexus RX400h 3.3L V6Special Price $10.61 Regular Price $14.99
- Walker Converter Right To Rear Exhaust Pipe Flange Gasket for 2003-2004 Lexus GX470 4.7L V8Special Price $10.61 Regular Price $14.99
- Walker Int Pipe Left To Extension Left Exhaust Pipe Flange Gasket for 1990-1994 Lexus LS400 4.0L V8Special Price $10.61 Regular Price $14.99
- Walker Converter Right To Rear Exhaust Pipe Flange Gasket for 2004-2006 Lexus ES330 3.3L V6Special Price $10.61 Regular Price $14.99
- Walker Converter Front Left To Rear Left Exhaust Pipe Flange Gasket for 2010-2017 Lexus GX460 4.6L V8Special Price $10.61 Regular Price $14.99
- Walker Int Pipe Right To Extension Right Exhaust Pipe Flange Gasket for 1990-1994 Lexus LS400 4.0L V8Special Price $10.61 Regular Price $14.99
- Walker Front Pipe To Rear Converter Exhaust Pipe Flange Gasket for 2003-2004 Lexus GX470 4.7L V8Special Price $10.61 Regular Price $14.99
- Walker Front Converter To Front Pipe Exhaust Pipe Flange Gasket for 2007-2009 Lexus RX350 3.5L V6Special Price $10.61 Regular Price $14.99
- Walker Exhaust Pipe Flange Gasket for 1992-1998 Lexus ES300 3.0L V6Special Price $10.61 Regular Price $14.99
- Walker Converter Right To Rear Exhaust Pipe Flange Gasket for 2002-2003 Lexus ES300 3.0L V6Special Price $10.61 Regular Price $14.99
- Walker Front Pipe To Y-Pipe Exhaust Pipe Flange Gasket for 2004-2006 Lexus RX330 3.3L V6Special Price $10.61 Regular Price $14.99
- Walker Left Converter To Front Pipe Exhaust Pipe Flange Gasket for 2010-2015 Lexus RX350 3.5L V6Special Price $10.61 Regular Price $14.99
- Walker Right Converter To Y-Pipe Exhaust Pipe Flange Gasket for 2010-2015 Lexus RX350 3.5L V6Special Price $10.61 Regular Price $14.99
- Walker Converter Rear Left To Rear Right Exhaust Pipe Flange Gasket for 2010-2017 Lexus GX460 4.6L V8Special Price $10.61 Regular Price $14.99
- Walker Front Converter To Front Pipe Exhaust Pipe Flange Gasket for 1999-2003 Lexus RX300 3.0L V6Special Price $10.61 Regular Price $14.99
- Walker Converter Rear To Muffler Assm Exhaust Clamp for 2006-2008 Lexus RX400h 3.3L V6Special Price $10.62 Regular Price $14.99
- Walker Converter Rear To Muffler Assm Exhaust Clamp for 2004-2006 Lexus RX330 3.3L V6Special Price $10.62 Regular Price $14.99
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