4 mm Flex-Hone Engine Cylinder Head 240 grit
Flex-Hone tools create a cross-hatch finish on the ID of the valve guide bore for better oil retention and less wear on both the valve guide and the valve stem.
Recommended RPM: 800 – 1200
Remember, Flex-Hone tools are designed to be used with Honing Oil or and oil based lubricant. Never use solvents with your Flex-Hone as it will degrade the adhesive bonds in the tool.
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