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.
Filter By Part Details
-
Fel-Pro Front Exhaust Pipe Flange Gasket for 2013-2015 Subaru Outback 2.5L H4Special Price $13.85 Regular Price $19.99 -
Walker Resonator Assm Exhaust System Insulator for 2005-2009 Subaru Outback 2.5L H4Special Price $11.48 Regular Price $15.99 -
Fel-Pro Exhaust Pipe Flange Gasket for 2013-2015 Subaru Outback 2.5L H4Special Price $13.85 Regular Price $19.99 -
2 pc Walker Muffler Assm Left Exhaust System Insulators for 2006-2009 Subaru Outback 2.5L H4Special Price $15.92 Regular Price $22.99 -
Fel-Pro Exhaust Manifold Gasket Set for 2001-2004 Subaru Outback 3.0L H6Special Price $16.61 Regular Price $23.99 -
Walker Front Converter To Rear Converter Exhaust Pipe Flange Gasket for 2006-2017 Subaru Outback 2.5L H4Special Price $17.05 Regular Price $23.99 -
Fel-Pro Exhaust Pipe Flange Gasket for 2006-2012 Subaru Outback 2.5L H4Special Price $20.63 Regular Price $28.99 -
Fel-Pro Exhaust Pipe Flange Gasket for 2006-2015 Subaru Outback 2.5L H4Special Price $21.99 Regular Price $30.99 -
Walker Exhaust Resonator for 2010-2017 Subaru Outback 2.5L H4Special Price $128.64 Regular Price $183.99 -
Walker Quiet-Flow Exhaust Muffler for 2010-2017 Subaru Outback 2.5L H4Special Price $149.58 Regular Price $213.99 -
Walker Resonator To Int Pipe Exhaust Clamp for 2010-2017 Subaru Outback 2.5L H4Special Price $9.21 Regular Price $12.99Out of stock -
Walker Resonator Assm To Y-Pipe Exhaust Clamp for 2010-2015 Subaru Outback 3.6L H6Special Price $9.21 Regular Price $12.99Out of stock -
Walker Front Pipe To Converter Exhaust Pipe Flange Gasket for 2001-2005 Subaru Outback 2.5L H4Special Price $9.81 Regular Price $13.99 -
Walker Flex Pipe To Converter Exhaust Pipe Flange Gasket for 2000 Subaru Outback 2.5L H4Special Price $9.81 Regular Price $13.99 -
Fel-Pro EGR Valve Gasket for 2001-2016 Subaru Outback 2.5L 3.0L 3.6L H4 H6Special Price $10.20 Regular Price $14.99 -
Walker Converter Right To Left Exhaust Pipe Flange Gasket for 2010-2015 Subaru Outback 3.6L H6Special Price $11.28 Regular Price $15.99 -
Walker Y-Pipe Exhaust System Insulator for 2010-2015 Subaru Outback 3.6L H6Special Price $11.48 Regular Price $15.99 -
Walker Resonator Exhaust System Insulator for 2013-2017 Subaru Outback 2.5L H4Special Price $11.72 Regular Price $16.99 -
Walker Muffler Assm Exhaust System Insulator for 2004 Subaru Outback 2.5L H4Special Price $11.72 Regular Price $16.99 -
Walker Int Pipe Exhaust System Insulator for 2010-2012 Subaru Outback 2.5L H4Special Price $11.72 Regular Price $16.99 -
Walker Converter Inlet Front Left Exhaust Pipe Flange Gasket for 2010-2017 Subaru Outback 2.5L H4Special Price $11.87 Regular Price $16.99 -
Walker Resonator Assm To Left Muffler Assm Exhaust Pipe Flange Gasket for 2005-2009 Subaru Outback 2.5L H4Special Price $11.98 Regular Price $16.99 -
Walker Resonator Assm To Right Muffler Assm Exhaust Pipe Flange Gasket for 2005-2009 Subaru Outback 2.5L H4Special Price $11.98 Regular Price $16.99 -
Walker Resonator Assm To Muffler Right Exhaust Pipe Flange Gasket for 2010-2015 Subaru Outback 3.6L H6Special Price $11.98 Regular Price $16.99 -
Walker Int Pipe To Muffler Exhaust Pipe Flange Gasket for 2010-2017 Subaru Outback 2.5L H4Special Price $11.98 Regular Price $16.99 -
Walker Converter Inlet Front Right Exhaust Pipe Flange Gasket for 2010-2017 Subaru Outback 2.5L H4Special Price $12.11 Regular Price $16.99 -
Walker Resonator Assm To Muffler Exhaust Pipe Flange Gasket for 2001-2004 Subaru Outback 2.5L H4Special Price $12.23 Regular Price $16.99 -
Walker Resonator Assm To Muffler Left Exhaust Pipe Flange Gasket for 2010-2015 Subaru Outback 3.6L H6Special Price $12.23 Regular Price $16.99 -
Walker Resonator Assm To Muffler Assm Exhaust Pipe Flange Gasket for 2000-2004 Subaru Outback 2.5L 3.0L H4 H6Special Price $12.23 Regular Price $16.99 -
Fel-Pro Exhaust Pipe Flange Gasket for 2006-2012 Subaru Outback 2.5L H4Special Price $13.85 Regular Price $19.99 -
Fel-Pro Right Exhaust Pipe Flange Gasket for 2001-2007 Subaru Outback 3.0L H6Special Price $15.02 Regular Price $20.99 -
Fel-Pro Exhaust Pipe Flange Gasket for 2005-2009 Subaru Outback 2.5L H4Special Price $15.02 Regular Price $20.99 -
Fel-Pro Rear Exhaust Pipe Flange Gasket for 2005-2009 Subaru Outback 2.5L H4Special Price $15.23 Regular Price $21.99 -
2 pc Walker Muffler Assm Right Exhaust System Insulators for 2006-2009 Subaru Outback 2.5L H4Special Price $15.60 Regular Price $21.99 -
Walker Rear Converter To Resonator Exhaust Pipe Flange Gasket for 2010-2017 Subaru Outback 2.5L H4Special Price $15.80 Regular Price $22.99Out of stock -
Fel-Pro Exhaust Pipe Flange Gasket for 2005-2009 Subaru Outback 2.5L H4Special Price $16.08 Regular Price $22.99 -
Walker Rear Converter To Resonator Assm Exhaust Pipe Flange Gasket for 2006-2009 Subaru Outback 2.5L H4Special Price $16.13 Regular Price $22.99Out of stock -
Walker Left Converter To Resonator Assm Exhaust Pipe Flange Gasket for 2004-2005 Subaru Outback 2.5L H4Special Price $16.13 Regular Price $22.99Out of stock -
2 pc Walker Converter Inlet Front Exhaust Pipe Flange Gaskets for 2006-2009 Subaru Outback 2.5L H4Special Price $16.37 Regular Price $22.99Out of stock -
2 pc Walker Front Pipe Inlet Exhaust Pipe Flange Gaskets for 2000 Subaru Outback 2.5L H4Special Price $16.37 Regular Price $22.99Out of stock -
Walker Left Converter To Resonator Assm Exhaust Bolt & Spring for 2004-2005 Subaru Outback 2.5L H4Special Price $16.41 Regular Price $22.99Out of stock -
Walker Converter To Resonator Assm Exhaust Bolt & Spring for 2000-2005 Subaru Outback 2.5L H4Special Price $16.41 Regular Price $22.99Out of stock -
Fel-Pro Exhaust Pipe Flange Gasket for 2013-2015 Subaru Outback 2.5L H4Special Price $16.54 Regular Price $23.99 -
2 pc Walker Front Pipe Inlet Front Exhaust Pipe Flange Gaskets for 2001-2005 Subaru Outback 2.5L H4Special Price $16.71 Regular Price $23.99Out of stock -
Walker Rear Converter To Resonator Exhaust Bolt & Spring for 2010-2017 Subaru Outback 2.5L H4Special Price $16.75 Regular Price $23.99Out of stock -
Walker Rear Converter To Resonator Assm Exhaust Bolt & Spring for 2006-2009 Subaru Outback 2.5L H4Special Price $16.75 Regular Price $23.99Out of stock -
Fel-Pro Center Exhaust Pipe Flange Gasket for 2013-2015 Subaru Outback 2.5L H4Special Price $16.88 Regular Price $23.99 -
Walker Converter To Resonator Assm Exhaust Pipe Flange Gasket for 2005 Subaru Outback 2.5L H4Special Price $18.98 Regular Price $26.99

































































