Pin, Knock 12x18

It is pretty much essential to replace these Knock (also know as Dowel) pins when rebuilding the engine to make sure cylinder barrel lines up precisely with the crankcase and cylinder-head. The old pins will be slightly worn leading to alignment problems.
Other knock pins you may wish to purchase:

9430110200
9430112150
9430112160
9430112220
9430110160

Renew for perfect precision.

Don't forget to order the seals and gaskets you will need to complete your engine build.