TWC (Under-floor) Removal/Installation
  1. Raise the vehicle on a lift.
  1. Remove the secondary HO2S (Sensor 2).
  1. Remove the nuts (A) and the bolts (B).
  1. Remove the under-floor TWC (C).
  1. Remove the cover (D).
  1. Install the parts in the reverse order of removal with new gaskets (E).