164S spark plugs

["Zacharey Cox (Siemens Business Services Inc)" <v-ntxzco@domain.elided>]

Hey there digestables, I'm in the market for a new set of spark plugs in my 164S.  I've believe I've heard of owners running the Bosch Platinum Plus 4 plugs with good results.  I went to the local parts store last night & they did not have a listing for the 2v models, only the 4v.  The p/n they have is 4417.  Can anyone confirm if these will work or which p/n I need?
 
Thanks,
Zach
Redmond, WA
'91 164S
'99 Ducati 900SS
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