Good luck finding parts in an auto parts store. I work part time at Pep Boys and they dont have anything for a GN thats specific to the turbo 6. They only have general parts that fit all G-body cars. If you want the seal in the turbo, you are best off looking online. I've found a whole rebuild kit for about $80. When you do look, its going to be listed as a T3/T4 turbo, according to the one company I contacted a while back. The name escapes me though, so I apologize.