Originally Posted by LSP
Originally Posted by merpar
Firms who buy pistons from the manufactures are demanding a smoother like 8-9ra.


Who is demanding a smoother pin bore finish?


All the past KB Icon pistons i’ve put together in the past ( about 4 motors) and the last Diamond set that went into a RB stroker had vary fine almost polished bores. Like merpar is speaking about. But, they all needed to be final honed to fit. They were all delivered slightly tight.

1.50 60Ft. , 10.75@ 127MPH Hauling 3900 LBS.