2015-17 Challenger Headers with 2" primaries, 3" offroad (converter delete) lead-pipes to fit factory connection point or Stainless Works exhausts. Comes Install-Ready with all adapters, necessary clamps, O2 extensions, bolts and RTV silicone. 2015-17 Challenger Headers with 2" primaries, 3" offroad lead-pipes to fit factory connection point or Stainless Works exhausts. Comes Install-Ready with all adapters, necessary clamps, O2 extensions, bolts and RTV silicone. 2015 thru 2017 Dodge Challenger Headers