This manifold came out of a 2011 Supra Launch 21V that kept getting engine codes for the oxygen sensor. Well low and behold, the CATALYST element was completely gone from this manifold. The PORT side was fine. Had to buy a new manifold for the starboard side.
This manifold pressure tested good by StateAMind Watersports.
SO IF YOU are running a Monsoon or Hammerhead without CATS, and need a backup, this manifold is a good fit.
Not trying to make a killing ... just help the owner offset the cost of the new manifold.
Ask any questions ... this is AS-IS item but it would work fine if you have a project boat without all the smog control stuff.