Speedmaster spark plug holes improvement??

What pistons are those, looking good.


Wiseco Pistons. 17428DA8-CA10-4DEF-9DC3-010BCF3450BC.jpeg3E45E530-A09A-4FF3-A6DC-75AA070FF4CD.jpeg66193F84-63BA-419D-B549-A9389324C8CF.jpeg