This system was a 2″ exhaust system all the way through. ¬†Our system comes complete with the correct front pipes with jut out to correspond to under seat¬†package tray. correct flanges, extensions, donuts, sealant, guillotine clamps, mufflers, installation instructions and diagrams. Reproduction center,and muffler hangers are available as well as stainless steel tips, heat riser and stud kit. Ask about our concourse show package. for the hobbiest who can’t stand surface rust. (Mufflers are available in standard and off-road N-11 packages)