These "pieces" play a central role in the episode's surreal b-plot:
During a basketball game, Kyle's new "knees" explode when he tries to dunk, leading to a graphic and absurd failure of the procedure. [S9E1] Mr. Garrison's Fancy New Vagina
Mr. Garrison undergoes a sex change operation to become Ms. Garrison. These "pieces" play a central role in the
The episode serves as a satire of body modification and identity, also featuring Gerald Broflovski undergoing a "dolphinoplasty" to become a trans-species dolphin. SMB #129 - S9E1 Mr.Garrison’s Fancy New Vagina - Spreaker [S9E1] Mr. Garrison's Fancy New Vagina