You talking about the rear turbo rubber o-ring, that goes in the little groove in the hard IC pipe? Part # MD090788, but you can find an o-ring that fits at Home Depot or Lowe's or someplace.
AutoForums.com is the premier network of enthusiast-owned
enthusiast-operated automotive communities.
We operate more than 100 automotive forums where our users consult peers for shopping information and advice, and share
experiences and opinions as a community.