83-. -26 -E / #098274. 83- MT (MPI&B). AT:1 Piece. EJ22E:1 Piece. EJ22E:2PCS EJ22EZ:1. MT (C0UTU0):2 PCS. MT (C0UTU0):3 PCS. POST:1 Piece. Plug that prevents the Engine Block or Cylinder Head from cracking in Case of freezing Coolant. Also used to Plug the casting holes from production.