Sunnen NN40C05 Cork Honing Stone Set for 4.0"-5.6" Cylinders

The Sunnen NN40C05 is a professional-grade cork honing stone set designed for final polishing operations on cylinder bores ranging from 4.0" to 5.6" in diameter. These specialized cork stones deliver a superior finish on freshly honed cylinder walls, making them ideal for automotive engine rebuilding and machine shop applications.

Key Features:

• Cork abrasive material for gentle final polishing without removing material
• Designed for AN-style hones and hone bodies
• Cylinder bore diameter range: 4.0" to 5.6" (102mm to 142mm)
• Integral holder type set includes 4 pieces: 2 holders with stones and 2 holders with aluminum wipers
• Compatible with popular Sunnen NN40 series honing systems
• Creates optimal surface finish for proper ring seating and oil retention

Cork honing stones are essential for the final step in cylinder finishing, helping to establish the proper crosshatch pattern and surface texture without altering bore dimensions. The NN40C05 set works seamlessly with Sunnen's proven honing technology to deliver consistent, professional results in engine rebuilding and cylinder reconditioning operations.