2. When we showed up to HB Hogs, Ed had already removed the stock exhaust system to save time. He then removed the oxygen sensors from the stock headers and installed them onto the new head pipes with anti-seize. Then he slipped in the new exhaust gaskets and loosely fit the Boss system to make sure everything lined up. The chrome heat shields were already installed to the 2-into-1 system. Once it lined up, Ed mounted the rear of the header's mounting tab on top of the transmission mount and snugged everything down.