Stainless Works HM642HDRCAT 2" Long Tube Headers w/ High-Flow Cats for 06-23 Challenger, Charger, Magnum, 300C SRT8 6.1/6.4L, SRT 392, SRT Hellcat 6.2L, 09-23 5.7L VVT HEMI RWD2015 17 Challenger Headers with 2" primaries, 3" lead pipes with high flow catalytic converters 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" lead pipes with high flow catalytic converters to fit factory connection point or Stainless Works exhausts. Install Ready with all adapters, clamps, O2