2015+ Dodge Challenger & Charger Hellcat 6.2L HEMI. 2006-2023 Dodge Charger, 2008-2023 Dodge Challenger, 2006-2008 Dodge Magnum SRT8, 2006+ Chrysler 300C SRT8 6.1L/6.4L HEMI. 2" x 3" Stainless Headers w/High Output GREEN Catted Connection Pipes and Competition Only Connection Pipes. 304 Stainless Steel Construction 3/8" Thick Laser Cut Flanges 2" Mandrel Bent Primaries 3" Collectors with Kooks' Patented Scavenging Spike Kooks High Output GREEN Cats 4-1/2" Bodied 300 Cell High Flow Catalytic Converters Kooks High Output GREEN Cats are engineered to perform in Modern Muscle cars making more than 750 RWHP Kit Also Contains Kooks Competition Only Connection Pipes to be Swapped Out for Track-Only Use Includes Gaskets, Oxygen Sensor Extension Harness, Clamps and Bolt Kit required for Installation No additional parts required.