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 2002-2019 Subaru Baja Forester Impreza Legacy Outback STI WRX 2.0L 2.5L H4Special Price $24.98 Regular Price $35.99 -
Walker Quiet-Flow Exhaust Muffler for 2010-2017 Subaru Outback 2.5L H4Special Price $156.30 Regular Price $222.99 -
Walker Rear Converter To Resonator Exhaust Pipe Flange Gasket for 2010-2017 Subaru Outback 2.5L H4Special Price $16.31 Regular Price $22.99 -
Fel-Pro Exhaust Pipe Flange Gasket for 1990-1995 Subaru Legacy 2.2L H4Special Price $16.52 Regular Price $23.99 -
Fel-Pro Front Exhaust Pipe Flange Gasket for 2012-2015 Subaru Impreza 2.0L H4Special Price $17.38 Regular Price $24.99 -
Fel-Pro Center Exhaust Pipe Flange Gasket for 2011-2015 Subaru Forester 2.5L H4Special Price $17.38 Regular Price $24.99 -
Fel-Pro Rear Exhaust Pipe Flange Gasket for 2004-2015 Subaru Impreza 2.0L 2.5L H4Special Price $22.29 Regular Price $31.99 -
Walker Quiet-Flow Exhaust Muffler for 2010-2017 Subaru Legacy 2.5L H4Special Price $172.60 Regular Price $246.99 -
Walker Resonator To Int Pipe Exhaust Clamp for 2013-2017 Subaru Legacy 2.5L H4Special Price $9.21 Regular Price $12.99Out of stock -
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 Int Pipe Exhaust Clamp for 2014-2016 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 To Int Pipe Exhaust Clamp for 2012-2016 Subaru Impreza 2.0L H4Special Price $9.21 Regular Price $12.99Out of stock -
Walker Resonator To Int Pipe Exhaust Clamp for 2013-2015 Subaru XV Crosstrek 2.0L 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 -
MAHLE EGR Valve Gasket for 1973-1987 Subaru Brat Deluxe DL GF GL GLF Standard 1.4L 1.6L 1.8L H4Special Price $9.22 Regular Price $12.99 -
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 Y-Pipe Exhaust Clamp for 2009-2013 Subaru Forester 2.5L 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 -
Walker Exhaust Pipe Flange Gasket for 2010-2015 Subaru Legacy 3.6L H6Special Price $9.49 Regular Price $13.99 -
Walker Exhaust Pipe Flange Gasket for 1993-2001 Subaru Impreza 1.8L 2.2L 2.5L H4Special Price $9.95 Regular Price $13.99 -
Walker Front Pipe To Converter Front Exhaust Pipe Flange Gasket for 1998 Subaru Forester 2.5L H4Special Price $9.95 Regular Price $13.99 -
Walker Front Pipe To Converter Exhaust Pipe Flange Gasket for 2001-2005 Subaru Outback 2.5L H4Special Price $9.95 Regular Price $13.99 -
Walker Front Pipe To Converter Exhaust Pipe Flange Gasket for 2003-2006 Subaru Baja 2.5L H4Special Price $9.95 Regular Price $13.99 -
Walker Front Pipe To Converter Exhaust Pipe Flange Gasket for 2000-2005 Subaru Legacy 2.5L H4Special Price $9.95 Regular Price $13.99 -
Walker Front Pipe To Converter Exhaust Pipe Flange Gasket for 2000-2005 Subaru Impreza 2.5L H4Special Price $9.95 Regular Price $13.99 -
Walker Front Pipe To Converter Exhaust Pipe Flange Gasket for 1999-2005 Subaru Forester 2.5L H4Special Price $9.95 Regular Price $13.99 -
Walker Front Converter To Rear Converter Exhaust Pipe Flange Gasket for 1995-1997 Subaru Legacy 2.2L 2.5L H4Special Price $9.95 Regular Price $13.99 -
Walker Exhaust Pipe Flange Gasket for 1985-1989 Subaru GL-10 1.8L H4Special Price $10.12 Regular Price $13.99Out of stock -
Fel-Pro EGR Valve Gasket for 2003-2006 Subaru Baja 2.5L H4Special Price $10.13 Regular Price $13.99 -
Fel-Pro EGR Valve Gasket for 2001-2016 Subaru Outback 2.5L 3.0L 3.6L H4 H6Special Price $10.13 Regular Price $13.99 -
Fel-Pro EGR Valve Gasket for 2013-2015 Subaru WRX STI 2.5L H4Special Price $10.13 Regular Price $13.99 -
Fel-Pro EGR Valve Gasket for 2006-2007 Subaru B9 Tribeca 3.0L H6Special Price $10.13 Regular Price $13.99 -
Fel-Pro EGR Valve Gasket for 2002-2015 Subaru Forester 2.5L H4Special Price $10.13 Regular Price $13.99 -
Fel-Pro EGR Valve Gasket for 2002-2014 Subaru Impreza 2.5L H4Special Price $10.13 Regular Price $13.99 -
Fel-Pro EGR Valve Gasket for 2008-2014 Subaru Tribeca 3.6L H6Special Price $10.13 Regular Price $13.99 -
Walker Front Converter To Rear Converter Exhaust Pipe Flange Gasket for 1998 Subaru Forester 2.5L H4Special Price $10.16 Regular Price $14.99 -
Walker Front Pipe To Converter Front Exhaust Pipe Flange Gasket for 1995-1997 Subaru Legacy 2.2L 2.5L H4Special Price $10.16 Regular Price $14.99 -
Walker Exhaust Pipe Flange Gasket for 1996-1999 Subaru Legacy 2.2L 2.5L H4Special Price $10.16 Regular Price $14.99 -
Walker Flex Pipe To Converter Exhaust Pipe Flange Gasket for 2000 Subaru Outback 2.5L H4Special Price $10.16 Regular Price $14.99 -
Walker Exhaust Pipe Flange Gasket for 1985-1989 Subaru GL 1.8L H4Special Price $10.33 Regular Price $14.99Out of stock -
Walker Converter Rear To Int Pipe Exhaust Pipe Flange Gasket for 1986-1989 Subaru XT 1.8L 2.7L H4 H6Special Price $10.33 Regular Price $14.99Out of stock -
Walker Exhaust Pipe Flange Gasket for 1985-1989 Subaru DL 1.8L H4Special Price $10.33 Regular Price $14.99Out of stock -
Fel-Pro EGR Valve Gasket for 2002-2016 Subaru Legacy 2.5L 3.0L 3.6L H4 H6Special Price $10.35 Regular Price $14.99


































































