Failed an emissions test? This can be down to dozens of reasons but is largely limited to parts in the car Fuel Delivery System. Causes can be as simple as a leaking gas cap, faulty vapor canisters that trap gas vapors in the fuel return lines to damage to the EGR Valves that recirculate exhaust gasses and reduce nitrogen oxides. Increased emissions can also be down to skipping maintenance intervals with regular replacement parts like vehicle Air Filters to deliver oxygen-rich and cleansed air for better engine efficiency, and Engine Oil Filters to filter out contaminants that cause wear.
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- Walker Muffler Exhaust Bolt & Spring for 1995-1998 Mazda Protege 1.5L L4Special Price $12.32 Regular Price $17.99
- Walker Int Pipe To Converter Exhaust Bolt & Spring for 1990-1991 Honda Civic 1.6L L4Special Price $12.32 Regular Price $17.99
- Walker Rear Converter To Resonator Assm Exhaust Bolt & Spring for 2006-2009 Subaru Legacy 2.5L H4Special Price $12.32 Regular Price $17.99
- Walker Int Pipe To Resonator Assm Exhaust Bolt & Spring for 1988-1991 Honda CRX 1.5L L4Special Price $12.32 Regular Price $17.99
- Walker Exhaust Bolt & Spring for 1994-1995 Acura Integra 1.8L L4Special Price $12.32 Regular Price $17.99
- Walker Resonator Assm To Muffler Assm Exhaust Bolt & Spring for 1997-2003 Acura EL 1.6L 1.7L L4Special Price $12.32 Regular Price $17.99
- Walker Rear Converter To Resonator Assm Exhaust Bolt & Spring for 2006-2008 Subaru Forester 2.5L H4Special Price $12.32 Regular Price $17.99
- Walker Int Pipe To Resonator Assm Exhaust Bolt & Spring for 1988-1995 Honda Civic 1.5L L4Special Price $12.32 Regular Price $17.99
- Walker Int Pipe To Muffler Assm Exhaust Bolt & Spring for 1996-1999 Isuzu Oasis 2.2L 2.3L L4Special Price $12.32 Regular Price $17.99
- Walker Converter Inlet Exhaust Bolt & Spring for 2002-2009 Honda CR-V 2.4L L4Special Price $12.32 Regular Price $17.99
- Walker Exhaust Bolt & Spring for 1985-1987 Honda Civic 1.5L L4Special Price $12.32 Regular Price $17.99
- Walker Front Converter To Front Pipe Exhaust Bolt & Spring for 1988-1991 Honda CRX 1.5L L4Special Price $12.32 Regular Price $17.99
- Walker Front Converter To Rear Converter Exhaust Bolt & Spring for 2007-2017 Jeep Compass 2.4L L4Special Price $12.32 Regular Price $17.99
- Walker Converter To Resonator Assm Exhaust Bolt & Spring for 1999-2002 Subaru Forester 2.5L H4Special Price $12.32 Regular Price $17.99
- Walker Rear Converter To Resonator Assm Exhaust Bolt & Spring for 2006 Saab 9-2X 2.5L H4Special Price $12.32 Regular Price $17.99
- Walker Converter Inlet Exhaust Bolt & Spring for 2000-2005 Honda S2000 2.0L 2.2L L4Special Price $12.32 Regular Price $17.99
- Walker Rear Converter To Resonator Assm Exhaust Bolt & Spring for 2006-2009 Subaru Outback 2.5L H4Special Price $12.32 Regular Price $17.99
- Walker Front Muffler Assm To Rear Right Exhaust Bolt & Spring for 2001-2006 BMW X5 3.0L L6Special Price $12.32 Regular Price $17.99
- Walker Int Pipe To Muffler Assm Exhaust Bolt & Spring for 1995-1998 Honda Odyssey 2.2L 2.3L L4Special Price $12.32 Regular Price $17.99
- Walker Resonator Assm To Muffler Assm Exhaust Bolt & Spring for 1993-1997 Honda Accord 2.2L L4Special Price $12.32 Regular Price $17.99
- Walker Front Pipe To Converter Exhaust Bolt & Spring for 1997-2000 Acura EL 1.6L L4Special Price $12.32 Regular Price $17.99
- Walker Resonator Assm To Int Pipe Exhaust Bolt & Spring for 2005-2008 Pontiac Vibe 1.8L L4Special Price $12.32 Regular Price $17.99
- Walker Converter Left To Rear Exhaust Bolt & Spring for 2002-2003 Jeep Liberty 3.7L V6Special Price $12.32 Regular Price $17.99
- Walker Converter To Resonator Assm Exhaust Bolt & Spring for 2000-2005 Subaru Outback 2.5L H4Special Price $12.32 Regular Price $17.99
- Walker Rear Converter To Resonator Exhaust Bolt & Spring for 2013-2015 Subaru XV Crosstrek 2.0L H4Special Price $12.32 Regular Price $17.99
- Walker Resonator Assm To Extension Pipe Exhaust Bolt & Spring for 1988-1989 Honda Civic 1.5L L4Special Price $12.32 Regular Price $17.99
- Walker Resonator Assm To Int Pipe Exhaust Bolt & Spring for 1988-1993 Acura Integra 1.6L 1.7L L4Special Price $12.32 Regular Price $17.99
- Walker Converter Center To Rear Exhaust Bolt & Spring for 2001-2003 Toyota Highlander 3.0L V6Special Price $12.75 Regular Price $17.99
- Walker Resonator Assm To Muffler Assm Exhaust Bolt & Spring for 2000-2004 Toyota Avalon 3.0L V6Special Price $12.75 Regular Price $17.99
- Walker Converter To Int Pipe Exhaust Bolt & Spring for 2001-2005 Honda Civic 1.7L L4Special Price $12.75 Regular Price $17.99
- Walker Front Pipe To Converter Exhaust Bolt & Spring for 1995-1998 Honda Odyssey 2.2L 2.3L L4Special Price $12.75 Regular Price $17.99
- Walker Front Pipe To Converter Exhaust Bolt & Spring for 1994-1997 Ford Aspire 1.3L L4Special Price $12.75 Regular Price $17.99
- Walker Front Pipe To Converter Exhaust Bolt & Spring for 1988-2000 Honda Civic 1.5L 1.6L L4Special Price $12.75 Regular Price $17.99
- Walker Resonator Assm To Muffler Assm Exhaust Bolt & Spring for 2002-2006 Acura RSX 2.0L L4Special Price $12.75 Regular Price $17.99
- Walker Resonator Assm To Extension Pipe Exhaust Bolt & Spring for 2003-2004 Pontiac Vibe 1.8L L4Special Price $12.75 Regular Price $17.99
- Walker Int Pipe To Converter Exhaust Bolt & Spring for 1990-1993 Acura Integra 1.8L L4Special Price $12.75 Regular Price $17.99
- Walker Front Converter To Rear Converter Exhaust Bolt & Spring for 2007-2008 Honda Fit 1.5L L4Special Price $12.75 Regular Price $17.99
- Walker Front Pipe To Converter Rear Exhaust Bolt & Spring for 2002-2003 Suzuki XL-7 2.7L V6Special Price $12.75 Regular Price $17.99
- Walker Front Converter To Rear Converter Exhaust Bolt & Spring for 2001-2011 Honda Civic 1.3L 1.7L L4Special Price $12.75 Regular Price $17.99
- Walker Front Pipe To Converter Rear Exhaust Bolt & Spring for 1999-2005 Suzuki Grand Vitara 2.5L 2.7L V6Special Price $12.32 Regular Price $12.75
- Walker Resonator Assm To Muffler Assm Exhaust Bolt & Spring for 2003-2008 Toyota Corolla 1.8L L4Special Price $12.75 Regular Price $17.99
- Walker Resonator Assm To Muffler Assm Exhaust Bolt & Spring for 1990-2001 Acura Integra 1.8L L4Special Price $12.75 Regular Price $17.99
- Walker Resonator Assm To Muffler Assm Exhaust Bolt & Spring for 1988-1991 Honda CRX 1.5L 1.6L L4Special Price $12.75 Regular Price $17.99
- Walker Front Pipe To Converter Exhaust Bolt & Spring for 1993-1995 Honda Civic del Sol 1.5L 1.6L L4Special Price $12.75 Regular Price $17.99
- Walker Left Converter To Resonator Assm Exhaust Bolt & Spring for 2004-2005 Subaru Outback 2.5L H4Special Price $12.75 Regular Price $17.99
- Walker Resonator Assm To Extension Pipe Exhaust Bolt & Spring for 2003-2005 Toyota Matrix 1.8L L4Special Price $12.75 Regular Price $17.99
- Walker Resonator Assm To Muffler Assm Exhaust Bolt & Spring for 1993-1995 Honda Civic del Sol 1.5L 1.6L L4Special Price $12.75 Regular Price $17.99