2008-2009-2010-2011-2012 5.7L, 6.1L, 6.4L Dodge Challenger Headers feature CNC 3/8" Flanges, 304 Stainless Steel made in the USA. Power you can feel Dodge Challenger 5.7L, 6.1L, 6.4L Headers. Made from high quality 304L stainless steel, these performance headers have 1.875" primaries and 3" slip fit collectors. With your choice of high-flow catalytic converters or off-road (converter delete) pipes. Complete with 3" lead-pipes, clamps and O2 extension for easy installation!