The Jeep specialist at St. Louis' Axleboy Off-Road install RIPP Long Tube headers into a JK Wrangler. These T304 stainless direct bolt-in headers are manufactured to give incredible performance and a flawless fit. Standard 3/8" thick flanges, merge-style collectors with scavenger spikes and severe duty metallic substrate cats. Plug-and-play Oxygen sensor extensions, and O2 bungs for relocating factory O2's are all included for a perfect install .