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
-
MAHLE Exhaust Manifold Gasket Set for 2002-2019 Subaru Baja Forester Impreza Legacy Outback STI WRX 2.0L 2.5L H4Special Price $24.48 Regular Price $34.99 -
Walker Front Pipe To Converter Exhaust Pipe Flange Gasket for 2000-2005 Subaru Legacy 2.5L H4Special Price $10.01 Regular Price $13.99 -
Walker Front Converter To Rear Converter Exhaust Pipe Flange Gasket for 1998 Subaru Forester 2.5L H4Special Price $10.01 Regular Price $13.99 -
MAHLE EGR Valve Gasket for 2001-2019 Subaru B9 Baja Forester Impreza Legacy Outback Tribeca 2.5L 3.0L 3.6L H4 H6Special Price $10.64 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 $15.99Out of stock -
Walker Int Pipe Exhaust System Insulator for 2016 Subaru Crosstrek 2.0L H4Special Price $11.72 Regular Price $16.99 -
Walker Front Pipe Inlet Left Exhaust Pipe Flange Gasket for 2002-2005 Subaru Forester 2.5L H4Special Price $11.87 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 Exhaust Pipe Flange Gasket for 2006-2011 Subaru Impreza 2.5L H4Special Price $13.85 Regular Price $19.99 -
Fel-Pro Exhaust Pipe Flange Gasket for 1990-2015 Subaru Legacy 2.2L 2.5L H4Special Price $14.14 Regular Price $19.99 -
Fel-Pro Exhaust Pipe Flange Gasket for 2013-2014 Subaru WRX 2.5L H4Special Price $15.02 Regular Price $20.99 -
MAHLE Exhaust Pipe Flange Gasket for 2012-2015 Subaru Crosstrek Impreza XV 2.0L H4Special Price $15.49 Regular Price $21.99 -
2 pc Walker Converter Inlet Front Exhaust Pipe Flange Gaskets for 2006-2016 Subaru Forester 2.5L H4Special Price $16.37 Regular Price $22.99 -
3 pc Walker Muffler Assm Exhaust System Insulators for 2000-2004 Subaru Outback 2.5L 3.0L H4 H6Special Price $20.12 Regular Price $28.99 -
Fel-Pro Exhaust Manifold Gasket Set for 2013-2016 Subaru WRX 2.0L 2.5L H4Special Price $20.30 Regular Price $28.99 -
Fel-Pro Exhaust Pipe Flange Gasket for 2006-2010 Subaru Forester 2.5L H4Special Price $20.63 Regular Price $28.99 -
Walker Rear Converter To Resonator Exhaust Pipe Flange Gasket for 2008-2016 Subaru Impreza 2.0L 2.5L H4Special Price $21.28 Regular Price $29.99Out of stock -
Fel-Pro Exhaust Pipe Flange Gasket for 2006-2012 Subaru Outback 2.5L H4Special Price $21.99 Regular Price $30.99 -
Fel-Pro Front Exhaust Pipe Flange Gasket for 2013-2016 Subaru BRZ 2.0L H4Special Price $21.99 Regular Price $30.99 -
Walker Front Converter To Rear Converter Exhaust Bolt & Spring for 1986-1991 Subaru XT 1.8L 2.7L H4 H6Special Price $22.47 Regular Price $31.99 -
Walker Converter To Resonator Assm Exhaust Pipe Flange Gasket for 2000-2004 Subaru Outback 2.5L H4Special Price $22.63 Regular Price $31.99 -
MAHLE Exhaust Pipe Flange Gasket for 2010-2012 Subaru Legacy 2.5L H4Special Price $22.65 Regular Price $31.99 -
2 pc MAHLE Front Catalytic Converter Gaskets for 2009-2010 Subaru Forester 2.5L H4Special Price $22.99 Regular Price $32.99 -
MAHLE Outlet Catalytic Converter Gasket for 2006-2008 Subaru Legacy Outback 2.5L H4Special Price $23.11 Regular Price $32.99 -
MAHLE Left Catalytic Converter Gasket for 2008-2014 Subaru Legacy Tribeca 2.5L 3.6L H4 H6Special Price $23.11 Regular Price $32.99 -
Walker Exhaust Resonator for 2009-2016 Subaru Forester 2.5L H4Special Price $131.27 Regular Price $187.99 -
Walker Quiet-Flow Left Exhaust Muffler for 2010-2015 Subaru Outback 3.6L H6Special Price $149.58 Regular Price $213.99 -
Walker Quiet-Flow Left Exhaust Muffler for 2008-2014 Subaru Tribeca 3.6L H6Special Price $162.42 Regular Price $231.99 -
Walker Resonator Assm To Int Pipe Exhaust Clamp for 2008-2014 Subaru Tribeca 3.6L H6Special Price $9.21 Regular Price $12.99Out of stock -
Walker Resonator To Y-Pipe Exhaust Clamp for 2009-2013 Subaru Forester 2.5L H4Special Price $9.21 Regular Price $12.99Out of stock -
Walker Resonator To Y-Pipe Exhaust Clamp for 2008-2011 Subaru Impreza 2.5L H4Special Price $9.21 Regular Price $12.99Out of stock -
Walker Resonator Assm To Int Pipe Exhaust Clamp for 2010-2012 Subaru Legacy 2.5L H4Special Price $9.21 Regular Price $12.99Out of stock -
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 Exhaust Pipe Flange Gasket for 2010-2015 Subaru Legacy 3.6L H6Special Price $9.38 Regular Price $12.99Out of stock -
Walker Resonator To Int Pipe Exhaust Clamp for 2013-2017 Subaru Legacy 2.5L H4Special Price $9.40 Regular Price $12.99Out of stock -
Walker Resonator Assm To Int Pipe Exhaust Clamp for 2006-2007 Subaru B9 Tribeca 3.0L H6Special Price $9.40 Regular Price $12.99Out of stock -
Walker Resonator To Int Pipe Exhaust Clamp for 2014-2016 Subaru Forester 2.5L H4Special Price $9.40 Regular Price $12.99Out of stock -
Walker Resonator To Int Pipe Exhaust Clamp for 2013-2015 Subaru XV Crosstrek 2.0L H4Special Price $9.40 Regular Price $12.99Out of stock -
Walker Resonator To Int Pipe Exhaust Clamp for 2012-2016 Subaru Impreza 2.0L H4Special Price $9.40 Regular Price $12.99Out of stock -
Walker Resonator Assm To Y-Pipe Exhaust Clamp for 2009-2010 Subaru Forester 2.5L H4Special Price $9.40 Regular Price $12.99Out of stock -
Walker Resonator To Int Pipe Exhaust Clamp for 2016 Subaru Crosstrek 2.0L H4Special Price $9.40 Regular Price $12.99Out of stock -
MAHLE EGR Valve Gasket for 1973-1987 Subaru Brat Deluxe DL GF GL GLF Standard 1.4L 1.6L 1.8L H4Special Price $9.41 Regular Price $12.99 -
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 Front Pipe To Converter Exhaust Pipe Flange Gasket for 2000-2005 Subaru Impreza 2.5L H4Special Price $9.81 Regular Price $13.99 -
Walker Front Pipe To Converter Front Exhaust Pipe Flange Gasket for 1995-1997 Subaru Legacy 2.2L 2.5L H4Special Price $9.81 Regular Price $13.99 -
Walker Exhaust Pipe Flange Gasket for 1996-1999 Subaru Legacy 2.2L 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


































































