Unleaded
Valve seat inserts that are suitable for use with unleaded fuel.
These valve seat inserts are suitable for machine shops with imperial pre sized cutters. The valve seat insert has the interference fit included to suit the nominal imperial counterbore.
The part number of the valve seat insert i.e. PC-1.250-5 is suitable for a counterbore of 1.250" as the interference fit is added to valve seat insert.