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 feel008-12 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!