One Year Unlimited Mileage Quality Guarantee.Before buying, Click the [amazonconfirmedfit] to check (Make, model, year, engine, Note,The engine and Note in particular) at the top of the link to see if your car can be used. 4pcs; 2x Upstream + 2x Downstream [For Dodge/Ram]: Fit 2002-2010 Dodge Ram 1500 3.7L; Fit 2003-2010 Dodge Ram 1500 5.7L; Fit 2002-2003 Dodge Ram 1500 5.9L;Fit 2004-2006 Dodge Ram 1500 8.3L; Fit 2003-2010 Dodge Ram 2500 5.7L; Fit 2003-2009 Dodge Ram 3500 5.7L; Fit 2011-2012 RAM 1500 3.7L; Fit 2011-2012 RAM 1500 5.7L; Fit 2011-2018 RAM 2500 5.7L; Fit 2011-2018 RAM 3500 5.7L; Fit 2012-2017 RAM 4500 5.7L ; Fit 2008-2010 Dodge Grand Caravan 4.0L; Fit 2011-2020 Dodge Grand Caravan 3.6L; [For Jeep]: Fit 2005-2010 Jeep Grand Cherokee 3.7 L; Fit 2008-2009 Jeep Grand Cherokee 4.7L; Fit 2005-2020 Jeep Grand Cherokee 5.7 L; Fit 2006-2010 Jeep Grand Cherokee 6.1L; Fit 2011-2020 Jeep Grand Cherokee 3.6L; Fit 2012-2020 Jeep Grand Cherokee 6.4L; Fit 2011-2017 Jeep Wrangler All; Fit 2002-2012 Jeep Liberty 3.7L; [For Chrysler]: Fit 2011-2017 Chrysler 200 3.6L; Fit 2005-2010 Chrysler 300 2.7L; Fit 2005-2010 Chrysler 300 3.5L; Fit 2011-2021 Chrysler 300 3.6L; Fit 2005-2010 Chrysler 300 5.7L; Fit 2005-2010 Chrysler 300 6.1 L; Fit 2008-2010 Chrysler Town & Country 4.0L; Fit 2011-2016 Chrysler Town & Country 3.6L;