just got a quote for some new parts however two items dont seem to match up

N3ZI 11S10A seal set
what is in the seal set as its only $73

N3AI 11B11 metal rotor
what is this? it says i need two at $56 each

if anyone knows that these two part numbers mean could you please tell me as i'm not sure if i need them or not

 

Well, I found the N3AI 11B11 but the other one didn't show up in my book. The part is, according to the book description ; bearing, rotor

 

the other are the rotor oil seals, same as 8871-23-180, but the part number is superceeded for the rx8. or basically they are more expensive now, you need qty of 4.
used to be able to get all 4 for $80+tax, now its $80 each....